Opening statements began Friday in the Allan Kustok murder trial.
Kustok is accused of killing his wife in their Orland Park home in 2010. His defense attorneys claim Anita Kustok committed suicide.
While the trial has just begun, one witness has already testified on video. A woman who says she had an affair with Kustok three months before his wife died.
Jurors will see that video at a later date during the trial.