Lori Hacking's (search) lying husband, charged this week in the death of his pregnant wife, was once sent home from a church mission for seducing a young woman he helped convert to the Mormon (search) faith, a new report says.

Mark Hacking (search), 28, also repeatedly strayed from his church's teachings and hid his secret life from his wife, this week's People magazine reports. His friends told the magazine the burly Mormon also drank alcohol, which is forbidden by the religion, and smoked cigarettes, another taboo.

The magazine reports that Hacking was sent to Canada on a mission several years ago but was sent home because of the sexual relationship. "That's definitely against the rules," said Scott Simpson, a fellow missionary.

Hacking was treated for depression when he returned, and the fallout from the affair seemed to have a serious effect on his relationship with Lori, whom he had been dating for about three years.

"Mark told her his [church partner] had done something wrong and he got sent home, too," one of her closest friends, Heidi Gregory, told People.

The strain was so great, the two stopped seeing each other for a while.

Hacking was arrested Monday and charged with aggravated murder, which carries a possible death sentence. Cops said he told a witness at the psychiatric ward where he was admitted after reporting his wife missing that he killed her while she slept — then threw her body into a dumpster.

Police yesterday released images from a video surveillance camera showing Hacking entering the Maverick convenience store in Salt Lake City with his ill-fated wife at about 9:30 p.m. on July 18.

It was the last day she was seen alive. The tapes could show a possible timeline for the killing.

A clerk at Maverick told People that Mark stopped by the store several times a week to buy cigarettes.

In another video shot four hours later, Mark Hacking returns to the store alone and is seen examining his hands, CBS News reported.

But Hacking's lawyer, Gil Athay, told CBS, "If you pump gasoline, you sniff your hands. There's nothing unusual about that videotape."

The magazine said Hacking had spent years spinning one whopping lie after another, telling his wife and family he was headed for medical school, even though he had secretly dropped out of the University of Utah in 2002. He even continued to show up on campus with a backpack full of books.