When a special prosecutor appointed by a new, reform-minded mayor is murdered, police scientist Gordon McKay (Van Heflin) applies his cutting-edge forensics skills to try and root out the culprit. Unfortunately, a corrupt power broker (Lee Bowman) is determined to erase the evidence...or anyone investigating it. Crisp M-G-M "B" thriller, the feature directing debut for Fred Zinnemann, also stars Marsha Hunt, Samuel S. Hinds, Paul Fix. 74 min. Standard; Soundtrack: English Dolby Digital mono.