The case of the Erie County man convicted of killing his wife and dumping her body in Lake Erie will be the focus of an episode of "Dark Waters: Murder in the Deep" airing on Investigation Discovery Wednesday, Aug. 14, at 10 p.m.

The episode titled "What Lies Beneath" explores Christopher Leclair's double life that ultimately led up to his wife's murder.

Leclair, who was a commercial fisherman, claimed in prison letters that he found his wife's body in Lake Erie but said he was forced to leave her in the water after he was called off of the lake by police. Police recovered her body off the shores of Western New York a few weeks later.

Investigators said Leclair shot his wife Karen, 51, in the head, tied her to an anchor then threw her body into Lake Erie from their fishing vessel the Doris-M.

During the trial, both the prosecution and defense agreed Leclair was having an affair with a woman named Tracy Butler at the time of his wife's death.

Butler testified she said she had been pushing Leclair to divorce his wife, so the two could start their own family.

Butler said she had been dating Leclair on-and-off since 2013, lived with him in Albion for eight months and worked as a crew member on the Doris-M.

Discovery said when Leclair had to chose between his wife and Butler, "disaster strikes out of nowhere, sending his heart to the bottom of the lake."

The show is part of the series "Dark Waters: Murder in the Deep," which Discovery says explores maritime murders.