Skip to main content

Charges: Willmar man brutally beat woman with knife handle

The Day One Crisis Hotline for domestic violence victims is always available at 1-866-223-1111.
Efrain Guerrero Jr.

A 32-year-old Willmar man is being held in the Kandiyohi County Jail on assault charges after allegedly brutally beating the mother of his child. 

Efrain B. Guerrero Jr. is accused of repeatedly punching and using the handle of a kitchen knife to assault his girlfriend, who, according to a criminal complaint, was left with black eyes, missing teeth, bruising around her head and indents and puncture wounds consistent with being beaten with a knife handle. 

Police didn't learn of the attack until Jan. 6, four days after the incident occurred. 

The criminal complaint says that Guerrero became angry with the victim when he found out that she was sending Snapchats to another man. Guerrero is accused of threatening the other man, replying to him: "See if you like her without her teeth," the complaint says. 

The victim told police that Guerrero punched her in the face three or four times while she was holding their 1 1/2-year-old child. The child was able to run away from the violence, which continued with Guerrero punching the victim for another 90 minutes to two hours. 

The complaint says Guerrero stopped punching and began using the handle of a "cleaver-type chef knife" to hit the woman 15-20 times on the "front, side, back, and top of her head." 

Once Guerrero stopped assaulting her, she was able to get off the floor and push him to the ground. But her attempt to escape was thwarted by dizziness and an inability to see due to the amount of blood in her eyes. Guerrero caught her and dragged her by the hair, then kicked and stomped on her back, according to the charging document. 

Guerrero made the woman take a shower, during which he invited another woman to the residence to help clean her up. The woman recommended she go to the emergency room but Guerrero wouldn't allow her to leave. 

The next day, once swelling in the victim's eyes decreased, Guerrero allowed her to go. 

On Jan. 6, police were alerted to the assault by the victim's mother. 

Guerrero was arrested Jan. 8 but denied assaulting the woman, instead blamed her injuries on the friend who he invited over to help clean her up, claiming they had gotten into a fight over jealousy of him. 

Guerrero has been charged with first-degree assault causing great bodily harm, second-degree assault, domestic assault, and violation of a no-contact order, all of which are felonies. 

He also has two prior domestic violence-related convictions dating back to 2011. 

If you know anyone that is affected by domestic violence, you can find more information on services available here, via the Minnesota DPS.

You can also call the Day One Crisis Hotline at 1-866-223-1111.

Next Up


3 dead after plane crashes into house in Hermantown

Two people in the house were uninjured.


Destructive fire at Maple Grove greenhouse and nursery

The fire burned early Sunday morning at a longtime Maple Grove greenhouse and nursery.

st. cloud state university hockey

SCSU player hospitalized after being taken off ice on stretcher

Luedtke was checked into the boards in the first period and down for a reported 10-15 minutes.

Amber alert wisconsin

Amber Alert in Wisconsin: Search for missing 15-year-old girl

Police believe 15-year-old Kryssy King may be with a 22-year-old man.

Screen Shot 2022-10-01 at 10.18.12 AM

3 St. Paul fast food restaurants robbed in space of an hour

The thieves struck between 7:15 p.m. and 8 p.m.

Screen Shot 2022-10-01 at 9.06.40 AM

What to do with the Kmart site? Minneapolis wants your ideas

The project will connect Nicollet Avenue south of Lake street and north of the Midtown Greenway, reestablishing a street grid.

Screen Shot 2022-10-01 at 7.53.55 AM

Crowd evacuated at end of homecoming football game in Brooklyn Park

Police blamed 'unruly teens' in the stands and some who were trying to enter the stadium.


State to help 44 Minnesota gas stations add E15 pumps

The yellow 88 button is coming to more gas stations in Minnesota.

Screen Shot 2022-09-30 at 4.54.42 PM

FBI, police investigating bank robbery at Edina's 50th and France

An ATM technician was robbed by four men at a U.S. Bank.

Ethan Glynn

Paralyzed Bloomington football player begins rehabilitation in Colorado

Ethan Glynn is at a world-renowned rehabilitation hospital.


Charges: Man assaulted woman in middle of street in Golden Valley

The Day One Crisis Hotline is always available at 1-866-223-1111.

Kjersten Schladetzky

Authorities detail timeline of triple-murder suicide in south Minneapolis

The Day One Crisis Hotline for domestic violence victims is 1-866-223-1111.

Terrion Sherman

Man, 23, charged in brutal murder of young St. Paul woman

A 23-year-old St. Paul man is facing a second-degree murder charge.

Edith Merrell

Charges: Rochester woman bites off piece of man's thumb

She's been charged with two counts of assault.

Police: Man choked 97-year-old woman at Willmar care facility

He was released without having to post bail on Friday.

police tape, crime scene

Woman fatally shot in West St. Paul, 21-year-old arrested

For domestic violence help, you can call the Minnesota Day One Crisis hotline at 1-866-223-1111.

Jamal Lamarr Jones

Charges: Man knocked woman out before kidnapping their baby

The baby was dropped off at urgent care in Minnetonka a day after being taken.

Elizabeth Lynch

Hector woman charged in shooting death of her boyfriend

The 42-year-old victim was shot dead on March 26.