The Killers - Robert Siodmak

Two professional killers invade a small town and kill a gas station attendant, "the Swede," who's expecting them. Insurance investigator Reardon pursues the case against the orders of his boss, who considers it trivial. Weaving together threads of the Swede's life, Reardon uncovers a complex tale of treachery and crime, all linked with gorgeous, mysterious Kitty Collins.