The 34-year-old shot and killed his parents and two of their friends in a Maine home just days after being released from prison, according to local authorities.

Around 9:20 am local time on Tuesday, four people were found shot to death in their home in Bowdoin: Robert Egger, 72, Patricia Egger, 62, and Cynthia Eaton, 62, were found inside the house. while David Eaton, 66, was found in a barn, Maine police said at a news conference on Wednesday.

Eaton’s son, Joseph Eaton, was released from Wyndham Correctional Facility in Maine on April 14 after serving time for aggravated assault, police said. His mother picked him up from prison and brought him to Bowdoin to stay with the Eggers, who were friends of the family, police said.

Police said shortly after finding the four bodies, around 10:30 a.m. Tuesday, Joseph Eaton shot and killed three people as they drove along a highway about 40 kilometers south of Bowdoin.

One of the victims of the freeway shooting, a 25-year-old woman, is in critical condition, police said. Two other victims, a 51-year-old man and his 29-year-old son, suffered non-life-threatening injuries, authorities said.

Joseph Eaton was taken into custody and “confessed to killing his parents and their friends at Bowdoin,” state police said. Eaton reportedly “believed the cars he was shooting at were police cars following him.”

According to police, he has been charged with four murders.

Source: Associated Press, Reuters.