 Technical advisor for the film was Sgt. Marty Wynn (qv) of the Los  Angeles Police Dept. During the course of shooting, he fell into  conversation with actor Jack Webb (qv), then the star of radios  "Jeff Regan, Private Investigator." Wynn suggested that Webb do a  radio series based on actual police files. Thus was born the idea  for "Dragnet," which debuted on NBC radio about four months after  this film was released.