On Wednesday an investigator testified that a search of Matthew Tornquist's car showed his mother's dead body was in it.
DCI Agent Pat West showed jurors pictures of Tornquist's car. He zeroed in on pictures of the trunk with Bluestar, which shows blood. West says they also found bullets in the vehicle.
The investigator believes Catherine Tornquist was slid in the trunk with a board.
Tornquist is charged with the 2011 murder of his mother. The trial is expected to last eight days.