Fridge Brilliance: Granted, this doesn't redeem the movie but having the movie bear a misleading title mirrors Dr. Krasker's theatricality and misdirection which, in the movie, is enough to bluff the murderer into a confession. It helps that he really does believe in his research. There's even some ambiguous dialog with the police about Krasker using his "unorthodox methods" to help them solve crimes in the past which, on second viewing, suggests that Krasker is willing to regularly take advantage of his reputation to long con criminals. It might even explain where he's getting the funding for his "research."
Fridge Logic: Considering the fact that the eventual murderer had A). the weakest alibi and B). the strongest motive, which the police had already discovered that he had lied about, there really was no point at all to the elaborate trap that Krasker came up with, since it seems pretty clear that they could have gotten the man with ordinary police methods.