BLOOMINGTON - Former Los Angeles police detective Philip Vannatter will give a presentation on the O.J. Simpson murder investigation and trial on Wednesday at Ivy Tech Community College in Bloomington.

Vannatter was the lead detective investigating the slayings of Nicole Brown Simpson and Ronald Goldman, and he was a key prosecution witness in the Simpson trial. He is the author of the book Evidence Dismissed.

Simpson, the actor and former football star, was found not guilty of the double murder in October 1995.

Vannatter will give a presentation from 6:30 to 8 p.m. in the Ivy Tech student commons. He will answer questions from 8 to 8:30 p.m.