Selmer, Tenn. ? A preacher’s wife accused of killing her husband with a shotgun blast had been depositing bad checks and feared he would find out, a prosecutor said as her murder trial opened Thursday.

The defense told jurors she killed her husband accidentally while trying to protect their child from him.

Mary Winkler, 33, only intended to hold her husband at gunpoint to force him to talk about his personal problems after a situation involving their 1-year-old daughter, Breanna, defense attorney Steve Farese said. The defense did not describe the situation.

“The morning he did what he did to Breanna, she was going to get his attention – with the very things he had always threatened her with,” Farese said. He said Matthew Winkler had threatened his wife with a gun many times.

A prosecutor described Matthew Winkler as a preacher, a good father and a man who trusted his wife. Even after she was arrested, Mary Winkler told police her husband was “a mighty fine person,” Assistant District Attorney Walt Freeland said.

The prosecutor said bank managers were closing in on a check-kiting scheme that Mary Winkler wanted to conceal from her husband. He said Mary Winkler had become caught up in a swindle known as the “Nigerian scam,” which promises riches to victims who send money to cover the processing expenses.

“This was beginning to catch up with Mary,” Freeland said. “The house of cards she had set up was falling down.”

But the defense attorney said Mary Winkler handled the family finances only because she did everything her husband told her. She was abused verbally, emotionally and physically, Farese said.

“Matthew and Mary Winkler had what appeared to everyone – those on the outside – to have had a marriage made in heaven. But behind closed doors it was a living hell,” he told the jury. “She lived a life where she walked on eggshells.”

Farese said Mary Winkler did not know how to load or fire a shotgun, and that she was afraid he would grab it from her. But the prosecutor said an expert will testify that the shotgun could not be fired accidentally.

The 31-year-old minister was found fatally wounded in March 2006 at the parsonage of his Fourth Street Church of Christ. His 33-year-old wife was arrested a day later some 340 miles away on the Alabama coast with their three young daughters.

Matthew Winkler’s father, Dan Winkler, testified later Thursday that he talked with his daughter-in-law after her arrest.

“I told her I wished I could take the handcuffs off and I could give her a big bear hug,” he said.

The trial could last up to two weeks. The jury – including a Baptist minister and woman who said she had been a victim of domestic abuse – will spend that time sequestered in a small-town motel without television, radio or cell phones.