The state prosecutor spent Tuesday afternoon pointing out what he says are contradictions in statements made by Brigg's family and friends.
Meanwhile, the wife of one murdered deputy is closely watching Briggs, and listening to every word in court.
29-year-old Dustin Briggs of Gillet sat motionless as he listened to the testimony in court.
Meanwhile, Kim Burgert was hearing new details about her husband's death at the Brigg's family property in Gillet.
She is the widow of Christopher Burgert, who was shot and killed along with Deputy Michael Van Kuren.
"I didn't know a lot of details. They didn't tell the family a lot of details, so everything is surprising, like I didn't know Chris's stuff was all over the place, and I don't know why his stuff would be all over the place," said Kim Burgert.
Burgert and other family members of the deputies also reacted strongly to the testimony of April Harris.
Although married now, she was Briggs former girlfriend and was at the home in Gillet when the deputies were shot.
Prosecutor Pat Blessington, says Harris is constantly changing her story.
For example, Harris originally told investigators that she heard shots fired immediately after Brigg's father walked out the door.
Later, she said a minute had passed.
Tuesday, Harris said a while had passed between the time the father went out and shots were fired.
Burgert says listening to the testimony like this and watching Dustin Briggs is difficult.
"I'm angry that he just sits there and acts like he did nothing. Nothing affects him," said Burgert.
The prosecutor also attacked Harris for spending time with a member of Brigg's defense team.
He suggested that she is trying to cover for Briggs and is lying now.
Wednesday, Briggs Father, Arlen, is expected to take the stand.