Here is a look at how events related to the shooting unfolded during the day Thursday:
6:55 p.m. Dayton speaks with protesters
Hundreds, possibly thousands of people gathered at J.J. Hill Montessori Thursday evening for a vigil to remember Castile, who worked at the school.
Afterward they marched back to the Governor's Mansion and continued their demonstration.
Gov. Dayton emerged from the residence to speak with them. Here are a few tweets from the scene.
6 p.m. Obama speaks about police shooting
President Barack Obama addressed the recent police shootings in Minnesota and Louisiana, saying all of us "should be outraged."
When people say "black lives matter, it doesn't mean blue lives don't matter – all lives matter," Obama noted.
He also said police reform has been too slow, and addressed the disparities between arrests of people of color and their white counterparts.
Watch his statement here:
5:30 p.m. Demonstrations in New York
Hundreds of people are gathered in Union Square in New York City to protest the police shootings of Philando Castile and Alton Sterling, NBC New York says.
3:30 p.m. Dayton asks, would shooting have happened if they were white?
No one should be shot and killed in Minnesota for a taillight being out, Gov. Mark Dayton said Thursday, adding he didn't think the shooting would have happened if the people in the car were white.
The governor said he's not passing final judgement on the situation, but there's indication the police response was "way in excess."
Dayton said this at a joint news conference with Mona Dohman, the Commissioner of the Minnesota Department of Public Safety, where they discussed the next steps in the investigation. It was the second time the governor spoke publicly about the shooting.
The governor, responding to requests from the community and other public officials to have the U.S. Department of Justice investigate the shooting, said the federal agency will be closely monitoring the Minnesota Bureau of Criminal Apprehension's investigation.
1:45 p.m. The view from St. Anthony Police Station
BringMeTheNews took a trip to St. Anthony Police Station and, unsurprisingly, nobody from the police department is talking.
A desk clerk told us that since the investigation is being handled by the Minnesota Bureau of Criminal Apprehension (BCA), all statements go through them.
The scene was quiet at the station, but there were two people standing outside holding placards, one saying "Stop shooting people" and the other saying "Killers."
The "Killers" sign was held by retired 68-year-old Pat Taubman, who told BringMeTheNews he had never protested outside a police station before but felt he had to after watching the video of Philando Castile's shooting when he woke up.
"It is a sad state of affairs once again," he said. "This is America, we are supposed to be free. I'm an old man and I'm starting to not feel free anymore."
1:20 p.m. Teamsters statement
1 p.m. President Obama comments on shooting
President Barack Obama is "deeply disturbed" by the fatal shootings of black men by police in both Falcon Heights and Baton Rouge.
A White House spokesman said the President is following both situations closely, and he later made this statement on Facebook.
Obama recently established a task force on policing to improve ties and trust between police and law enforcement.
12:40 p.m. Twitter video shows aftermath
Twitter video showing the aftermath of Castile's shooting appears to show first responders around Castile. It's unclear how long after the shooting it was taken.
A rally is planned for Selby Avenue in St. Paul this afternoon – WCCO says it'll be along Selby Avenue at 5 p.m. According to the Star Tribune, a vigil will take place at 5:30 p.m. at J.J. Hill Montessori.
In addition, a spokesperson for Gov. Mark Dayton said he may have another media briefing Thursday, but isn't sure.
11:35 a.m. St Paul Public Schools: 'He was smart, over-qualified'
St. Paul Public Schools has released a statement about Castile's death.
One co-worker said: "Kids loved him. He was smart, over-qualified. He was quiet, respectful, and kind. I knew him as warm and funny; he called me his 'wing man.'
"He wore a shirt and tie to his supervisor interview and said his goal was to one day 'sit on the other side of this table.'"
Castile worked at the J.J. Hill Montessori Magnet School on Selby Ave.
11:20 a.m. 'It's ok, I'm right here with you.'
One of the most heartbreaking moments of the video can be heard at 9:08 (graphic footage warning) in which Lavish Reynolds is handcuffed in the back of a car next to her 4-year-old daughter.
With Reynolds audibly upset, her daughter tells her: "It's ok, I'm right here with you."
10:45 a.m. Lavish 'Diamond' Reynolds speaks again
Castile's girlfriend is speaking at the press conference (live feed at 10 a.m. update) and said she felt treated like "a criminal" by officers at the scene.
She says Castile was shot five times and the police did not check for a pulse after he was shot. She also said the other officers at the scene rushed to comfort the officer who shot Castile.
She also claims she was directed to the wrong hospital rather than where Castile was being held. And that she was held in Roseville jail for hours, apart from her 4-year-old daughter.
The two officers who responded to the scene have been placed on administrative leave as is customary following officer-involved shootings.
10:25 a.m. Dayton: 'A horrible tragedy, and a senseless tragedy'
Some comments from Gov. Dayton: "On behalf of all decent Minnesotans, which is almost all of us, we are shocked and horrified by what occurred last night.
"It's a horrible tragedy and a senseless tragedy ... this behavior is unacceptable and not normal in Minnesota.
"I promise I will do everything in our power to see that justice will be served in Minnesota. All avenues will be pursued."
Dayton also revealed he has spoken this morning with White House Chief of Staff Denis McDonough, who was aware of the situation and is said to be "shocked and concerned."
He also has been in touch with the U.S. Attorney General's head of civil rights division, and asked them to come to Minnesota as soon as possible and follow whatever course of action they determine is appropriate.
10:10 a.m. Dayton to speak, calls for DOJ investigation
Governor Mark Dayton has appeared outside his residence along with the NAACP's Nekima Levy-Pounds. He will be speaking shortly.
He just released this statement. You can watch the live video below:
10 a.m. Live stream of family, NAACP press conference.
9:55 a.m. Castile had minor criminal record, all traffic-related
The Minnesota courts system shows that Castile has a minor criminal history, with nothing more serious than a misdemeanor on his record.
All of his misdemeanor and petty misdemeanors are traffic-related and date back to 2002. They include driving without insurance, driving after license revocation, driving without a seatbelt, and improper display of license plate.
9:45 a.m. Reynolds: 'He was loving, took care of my daughter'
"He was very loving, not gang affiliated, he worked for St. Paul public schools for over 10 years. He never had a criminal history, all he did was went home and played the game," Reynolds said.
"He wasn't in the streets, he worked six days, five days a week. He went to work, he came home and he took care of my daughter. That was it.
"I work two jobs, he worked one job and we support each other. It's my daughter, it's not his child, but he raised her and took care of her as if she was his."
9:30 a.m. Listen: More from Lavish 'Diamond' Reynolds
More BringMeTheNews audio below from Lavish Reynolds speaking of her boyfriend's death. For more from the scene, follow GoNewsMN on Snapchat.
She said it was Castile's birthday in nine days' time.
"If we are able to have a license to carry, then a police officer should not be able to gun a man down," she said.
9:10 a.m. Listen: Woman who took the video speaks out
Lavish "Diamond" Reynolds, the girlfriend of Philando Castile who took the video after he had been shot, has been speaking out Governor Dayton's Residence, according to BringMeTheNews producers at the scene.
"This was my best friend, I don't have anybody in Minnesota," she said. "They took his life for no reason ... I want justice and I want peace."
She says Castile was shot "four or five times" by the officer shortly after telling him he had a permit to carry and was in possession of a handgun.
She claims that after the shooting she was taken to a jail in Roseville where she was kept till 5 a.m. Her phone was seized as well as her car.
You can listen to Reynolds' speech below.
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8:55 a.m. Call for federal investigation
This just in from Minnesota Congresswoman Betty McCollum (DFL-4th District), who is calling for a federal investigation into Castile's shooting.
8:45 a.m. Live Snapchat from the scene
BringMeTheNews producers Shaymus McLaughlin and Melissa Turtinen are outside the Governor's Residence in St. Paul and you can follow their updates via BringMeTheNews's Snapchat account by searching for "GoNewsMN."
8:30 a.m. #PhilandoCastile No. 1 trend worldwide
News of last night's shooting has spread around the world, with #PhilandoCastile currently the number 1 worldwide trending topic on Twitter.
There's a lot of speculation on there about the circumstances surrounding his death – much of it yet to be confirmed from official sources – as well as commentary on the implications for the wider debate about police treatment of black Americans.
8:10 a.m. DFL: 'His death is unacceptable'
Ken Martin, chairman of the Minnesota DFL Party, has just issued a strongly-worded statement about Castile's death, calling him a "victim of senseless violence that is all too common to a select group of our country."
Here's the full statement:
8 a.m. What do we know of Philando Castile?
Details of Philando Castile's background have emerged this morning, here's what people are saying about him:
- He worked at the J.J. Hill Montessori Magnet School in St. Paul, which has him listed as the cafeteria supervisor. He'd worked there for 12-15 years.
- He graduated from St. Paul's Central High School in 2001, according to St. Paul Public Schools. His cousin told the Star Tribune he graduated with honors and was a "straight-A" student.
- His mother Valerie told WCCO: "He's never been in no trouble. He did everything by the law and he died by the law ... he died everything he was supposed to as far as being a law-abiding citizen."
7:40 a.m. Castile's family speaks
Philando Castile's mother and uncle have appeared on CNN this morning speak about the 32-year-old's death. His mother, 60-year-old Valerie Castile, said "complying" with police was something they had always discussed.
"What's the difference if you're complying, and you get killed anyway?" she said.
7:25 a.m. Dayton press conference postponed
Governor Mark Dayton was due to give a press conference on water quality at 10 a.m. today, but his spokesman Matt Swenson just sent out an alert that it has been canceled.
No reason has been given for the postponement, and BringMeTheNews has asked his office when the Governor will making a statement.
Contrary to reports on social media, WCCO's Jason DeRusha says the Governor is still inside his residence and wasn't "evacuated."
7:10 a.m. The video
Castile's girlfriend Lavish Reynolds, who was a passenger in the car when the shooting occurred, used the recently launched "Facebook Live" feature to live-stream the aftermath of the shooting, which shows a bloody Castile slumped in the car with the officer who shot him still pointing a gun at him.
According to The Daily Beast, Facebook took the video down from Reynolds' Facebook account, but not before it had been captured by other media and put on YouTube. The social media site has since reinstated it.
The news website says that contemporaneous video accounts, such as the one taken by Reynolds, are treated like a "time-stamped diary" and is generally admissible as evidence in criminal proceedings.
6:40 a.m. Protests outside Governor's Residence.
A large crowd congregated outside Minnesota Governor Mark Dayton's mansion in St. Paul in the aftermath of Castile's shooting.
KSTP reports around 200 people were outside the building in the early hours of Thursday morning, blocking traffic on Summit Avenue.
Among those in attendance was Nekima Levy-Pounds, the president of the Minneapolis NAACP, who told the crowd: "I'm tired of the laws and policies on the books being used to justify murder.
"This is completely unacceptable. Somebody say 'enough is enough.'"
Protesters chanted "wake him up, wake him up," according to the Pioneer Press, but it is not known at this stage whether Gov. Dayton was inside at the time.
6:20 a.m. What happened
If you're just waking up, here's a summary of last night's events.
- St. Anthony police pulled over a car at Larpenteur and Fry in Falcon Heights at around 9 p.m. Wednesday, and during the stop they fatally shot 32-year-old Philando Castile, of St. Paul.
- Castile's girlfriend, identified on Facebook as Lavish Reynolds, was in the car with her 4-year-old daughter and live-streamed the aftermath of the shooting on the social media site.
- She claims her boyfriend was taking his wallet out to show the officer his driver's license when he was shot, but also told the officer he had a handgun with a permit to carry.
You can read the full story here, along with the graphic video footage taken by Reynolds at the scene.