The suspect in the slaying of a Pennsylvania state trooper sent a text afterward to his son’s mother, apologizing to her and acknowledging, “I killed the cop,” according to court records released Tuesday.

The arrest warrant, issued before suspect Jason Robison was shot and killed by police, said Trooper Landon Weaver came to Robison’s home in Hesston on Friday to investigate a report that Robison had defied a protective order by contacting his son’s mother.

The 23-year-old trooper told Robison that his text exchanges with her violated a protection-from-abuse order issued in April. Robison, 32, replied he did not want to go to jail, police said.

Sherry Robison, Robison’s mother, told investigators that Jason Robison and Weaver had been in a mudroom beside the kitchen when Robison came into the kitchen, put a lighter on a counter and pulled a small black gun from his pants.

“She stated, ‘Jason what are you doing?’” police wrote. Robison then stepped into the mudroom, and she heard a “pop” and saw Weaver fall face-down into the kitchen, bleeding, the document said. Sherry Robison yelled for her boyfriend, who was in the basement, and he called 911.

Police said about 15 minutes later, Jason Robison sent three texts to his child’s mother: “I killed the cop,” “Shot him twice in the head he is dead. I love you! I always will!” and “Good bye sweetheart. I’m Sorry.”

Police tracked Robison to an unoccupied mobile home nearby the next morning. Police said they shot and killed him after he refused orders and made threats.

Huntingdon County District Attorney David Smith said troopers from outside the area were leading separate investigations into the two shootings. He said an autopsy has been done on Weaver, but he declined to discuss the results.