Like most people, probably, I had never heard about "Without Warning!" before, but it's a surprisingly tense and bleakly atmospheric mixture between film-noir and drama. The plot follows both a frustrated serial killer, who scouts for lurid blond women in sleazy Hollywood bars, and the police inspectors that are trying to catch him via profiling and the little pieces of forensic evidence that he leaves behind at each crime scene. I'm certainly not an expert of CSI-cinema, but since this film was released in 1952 already, it simply must be one of the earliest productions to make use of advanced & specialized researching techniques. The story of crazed killer Carl Martin is quite an unsettling one. With his good manners, baby-faced appearance and admirable job as a city gardener, he's the last person one would suspect to be a homicidal maniac. But at the beginning of each month, right after he cashed in his paycheck and can afford to dress up nicely and offer drinks to ladies, he prowls for pretty blonds that resemble his unfaithful ex-wife and lures them to remote places to stab them with his gardening shears. Police lieutenants Hamilton and Wade quickly figure out his patterns and profile, but can they arrest Martin before he unleashes his angers again on the innocent store owner's daughter Jane? Perhaps the film could have done without the redundant and overly dramatic voiceover guidance, but director Arnold Laven ("The Monster that Challenged the World") maintains a steady pace as well as a good balance between serial killer suspense and intriguing police work. The escape of Carl Martin following the murder of the stunningly hot nameless victim (Angela Stevens) that almost went wrong, as well as the entire finale up in the Hollywood hills, are genuinely exhilarating; - especially taking into consideration "Without Warning!" is a low-budgeted B-movie.
