Now to the baby face charged with killing his own mother. Friday was a chilling first day in court as jurors heard the haunting 911 call on the day of the murder. John muller has been covering the... See More
Now to the baby face charged with killing his own mother. Friday was a chilling first day in court as jurors heard the haunting 911 call on the day of the murder. John muller has been covering the story from the beginning. Reporter: Elizabeth, if day two is anything like the first day, it should be riveting, a medical examiner who looked over those wounds to jeffrey pyne's hands is expected to testify. Of key interest those massive blisters on son jeffrey's hands. 22-year-old jeffrey pyne watched stone-faced as prosecutors wasted no time hammering away with their strongest evidence. He lied about how he got those. Reporter: Startling photographs of pyne's hands covered with massive blisters. The photograph taken just hours after his mother was found brutally murdered. He's accused of bludgeoning and stabbing ruth pyne inside their suburban michigan home may of 2011. He hit her in the back of the head. And he hit her again. Reporter: Pyne's former boss from a farmer's mar testified jeffrey got the beliefers on the job throwing a shipping pallet. He also testified the investigation didn't add up. It did seem odd to me. I'd expect more of a splinter or scrape more than what rye -- than what looked like a rope burn. Reporter: A strong showing for the prosecution who also played 911 tapes of the horrific moment after pyne's father and sister found ruth pyne's body. She's laying in the garage. There's blood everywhere. I don't know what's going on. Okay, okay, is she in the house or outside? She's in the garage. Reporter: Prosecutors contend jeffrey pyne killed his mother in a rage after years of abuse. Ruth pyne was bipolar. The defense maintains jeffrey pyne is innocent. Somebody else committed this crime. I believe the evidence will show you that. Reporter: And despite the troubling blisters on his hands, the beloved jeffrey pyne still carries the support of most of his michigan community, as they stand behind the former athlete and star student. Described as a great all-around great guy. Jeffrey pyne if convicted faces the possibility of life in prison without parole.
This transcript has been automatically generated and may not be 100% accurate.