The Ambulance Made Two Trips :

The Ambulance Made Two Trips by Murray Leinster is a riveting blend of hard-boiled crime and speculative science fiction. When Detective Sergeant Fitzgerald investigates a crime wave tied to racketeer Big Jake Connors, he uncovers more than just thuggery—he finds reality bending around a mysterious psi unit. As violent plans backfire in bizarre ways, Fitzgerald teams up with the enigmatic Brink to confront corruption head-on. Featuring telepathy, probability manipulation, and noir tension, this 1960s classic challenges the nature of justice and control in a world where unseen forces fight back.