SOUTH BEND, Ind. -- The state began presenting evidence in the murder trial of Phillip Geans. He is accused of killing 16-year-old Theresa Burns in 1988.

The prosecution began with questioning the doctor who performed the autopsy on Burns, Dr. David Jentz.

Dr. Jentz described that Burns died from multiple gunshot wounds to the head.

Graphic post mortem photos of Burns were presented as evidence, which caused several spectators to cry.

St. Joseph County Prosecutor Ken Cotter says the jury may never hear a motive, but a motive is not necessary for either possible verdict.

The trial is expected to continue for five to seven days.

Click here to read ABC57's coverage of Theresa Burns' murder