Walker, 34, has been arrested on preliminary charges of aggravated battery, receiving stolen auto parts, criminal mischief, two counts of battery, three counts of criminal recklessness and two counts of resisting law enforcement.
What seems to have triggered his jealousy that day was a brief conversation that his wife, Tina Walker, had with an ex-boyfriend at the Dupont branch of the Allen County Public Library, according to a probable cause affidavit filed Friday by Allen County prosecutors.
Tina Walker told sheriff's detectives that after the conversation with her ex, her husband's body language became agitated. When they arrived home at the Dupont Estates mobile home park, near Dupont and Diebold roads, Stephen Walker started drinking rum and watching a movie, the affidavit stated.
He asked his wife to sit on the couch with him, but she declined. As he kept trying unsuccessfully to gain her attention, he became angry. While he simmered, he made the shape of a gun with his hand and gestured as though he was shooting at her, the affidavit said.
In response, Tina Walker told her husband to go ahead and shoot her because she was not going to be scared of him anymore. At that point, Stephen Walker went to their bedroom and got a .25-caliber handgun from a safe. Meanwhile, Tina Walker grabbed a steak knife from the kitchen and hid it in her sleeve for protection, the affidavit stated.
She told her daughter, Ashley May, that she might have to call police. Tina Walker then went into her daughter's bedroom, and Stephen Walker made a comment about his wife's ex-boyfriend before he followed her into the room, the affidavit said.
Tina Walker was sitting on the bed, and he was about a foot away when he opened fire. Two shots pierced her chest, and a third grazed her. She fell to the floor, and then he pointed the gun at his stepdaughter's head as she sat on the floor, according to the affidavit.
He fired as she raised her arms to protect herself. The bullet struck her cellphone and finger before going down her arm, the affidavit stated.
The mother and daughter managed to escape the home, and people nearby came to their aid as Stephen Walker sped away in a car, the affidavit stated. The two women were hospitalized, and they were recovering by the next day, the sheriff's department said.
Both women are adults, but their ages have not been released.
Allen County officers searched for Walker until Thursday morning when they spotted him near the mobile home park. He initially ran from them, but he was later seen driving a blue Lexus while wearing a motorcycle helmet. He led police on a car chase, and they eventually captured him in a field off Diebold Road.
Walker was being held Friday at the Allen County Lockup in lieu of $162,500.
Walker, of the 8100 block of North Clinton Street, is a registered sex offender. Records show he was sentenced to prison on Allen County convictions of domestic battery in 2007 and sexual misconduct with a minor in 2007 and again in 2012.