A murder trial was underway in Guelph Monday for the man accused of killing Chris Schweitzer in June of 2015.

Sean Haverty pleaded not guilty to first-degree murder and then pleaded guilty to weapons charges for having a prohibited firearm without a license and for having a loaded firearm.

Haverty sat in the prisoners' box of a packed courtroom with about 130 potential jurors.

The courtroom heard Chris Schweitzer died during a fight in the front door of a home of Tiffany Street June 18 2015. At the time, Police would not release how he died.

According to a public court document, Haverty lived a few doors down from where the incident happened.

Lawyers estimate this trial will last three weeks.

With reporting from CTV Kitchener's Abigail Bimman