INDIANA, Pa. -- A state trooper charged with homicide took the stand in his own defense on Wednesday and claimed innocence in the death of Blairsville dentist Dr. John Yelenic.

Yelenic was stabbed and nearly decapitated in his home in April 2006. Foley was involved with Yelenic's estranged wife, Michele, and police believe a fight concerning the relationship led to the attack. The defense is trying to convince jurors that Foley would never commit such a brutal crime.

When asked if he killed Dr. Yelenic, Foley told the jury at the Indiana County Courthouse, "I am innocent." The jury even laughed at his jokes a few times.

The courtroom was packed for Foley's testimony. Channel 4 Action News' Jennifer Miele reported dozens of people were lined up in the hallway, trying to get inside.

Get the latest news direct from the courtroom: Jennifer Miele Blogs The Pa. State Trooper Trial In Indiana County

Foley admitted he did not like Dr. Yelenic because of the way he talked to Michele during the divorce proceedings, but said he was joking when he asked another state trooper to help kill the man.

The prosecutor, Senior Deputy Attorney General Anthony J. Krastek, asked what was so funny about that. Foley said quietly, "Nothing," and went on to explain that he was the practical joker of the barracks and everyone knew he was kidding.

Foley told the jury that he adopted a child from Guatemala one month before the murder. Foley, a single father, said it was the happiest time of his life when he brought the child home, and he said Michele Yelenic was happy too because her divorce was nearly final.

The defense rested its case and the jury began its deliberations late Wednesday afternoon.

Stay with WTAE Channel 4 Action News for the announcement of a verdict when it happens.