On Tuesday night , 43-year-old Jason Eaton strolled into Greensburg, Indiana’s police station and asked if he could talk to an officer.
Then something unusual happened: Eaton met with a detective and allegedly confessed to shooting his girlfriend — a woman he’d tried proposing to, unsuccessfully, just hours earlier, according to court documents obtained by PEOPLE.
He has since been charged with murdering the mother of two.
An arrest affidavit alleges that Eaton was talking to his girlfriend — 44-year-old Wendy Sabatini — in the upstairs bedroom of the couple’s Greensburg home on Tuesday afternoon when he pulled a velvety ring box from his pocket, opening it to reveal an engagement ring.
Eaton allegedly told investigators that Sabatini cut him off before he could even pop the question. Upon seeing the ring, Sabatini stopped Eaton and “declined” his imminent proposal, the affidavit alleges.
Eaton “then retrieved a firearm from a nightstand and moved behind Sabatini, who was seated on the opposite side of the bed,” he allegedly told investigators, according to the affidavit.
“Eaton said the gun fired, striking Sabatini in the head,” the affidavit’s allegations continue. “Eaton said he left the gun in the bedroom, went back downstairs, and eventually left the house.”
Not long after the shooting, Eaton allegedly told detectives he drove to the home of a female friend. “Eaton said he told [the woman] that he messed up and he thinks he killed Sabatini,” the affidavit alleges. “[The woman] transported Eaton to the Greensburg Police Department.”
• Want to keep up with the latest crime coverage? Click here to get breaking crime news, ongoing trial coverage and details of intriguing unsolved cases in the True Crime Newsletter.
As soon as Eaton allegedly revealed to police he had shot his girlfriend, officers rushed to their home, according to the affidavit. There they found Sabatini’s son, who was eating dinner after just returning home from a school-related internship.
When asked where his mother was, the son told officers she was at work, according to the affidavit. He also told them he was unaware of any problems his mother may have been having with Eaton.
Police searched the home and found Sabatini’s body in the bedroom she shared with Eaton, the affidavit states. She had a single bullet wound “to the crown of her head,” and officers recovered a gun at the scene that they believe was the weapon used.
Police confirm to PEOPLE that Sabatini had two children and was also a grandmother. She and Eaton worked the late shift together at an auto parts manufacturing plant in Greensburg.
Some of Sabatini’s friends have launched a GoFundMe campaign to help fund her funeral. (PEOPLE could not immediately reach her friends or family.)
A court official tells PEOPLE Eaton has yet to enter a plea to the charges against him and has no defense attorney on record.