There is some controversy on the reasons for Clark's actions on the night of the crime. For example, he was playing music in his car at high volume. The state believed that the music was meant to lure the officer to his vehicle with a nuisance offense, as Clark had mentioned to a friend that he wanted to shoot a cop. The defense expert, Dr. Morentz, dismissed that theory and believed Clark was playing music loudly to "drown out" the voices in his head, a tactic common among paranoid schizophrenics.