Dressed to Kill (1980)

The latest fashion in murder.

In this film that combines Hitchcock's slick premises with modern-day gore, a lonely wife follows her shrink's advice and seeks comfort in a stranger. After a seductive, dangerous encounter, the wife meets a homicidal maniac. The prostitute who discovers the body and the victim's son must track the killer, a tall blonde "woman" with a trenchcoat and a razorblade.