A 61-year-old man has died after spinning into a ditch on his ATV, sending him into swampy water.
The State Patrol says the 26-year-old driver was also not belted.
A man and a woman have been charged with animal mistreatment.
It happened in northern Minnesota on Friday morning.
A standoff with police ensued, during which he set fire to much of the house.
The crash happened Tuesday and the man died Friday morning.
The suspect committed suicide and two women died of homicide.
A friend has identified the suspected gunman to local media.