Vice Raid (1960)
Directed by: Edward L. Cahn
Stars: Mamie Van Doren, Richard Coogan, Brad Dexter
Syndicate crime boss Malone (Brad Dexter) wants to get do-gooder vice cop Whitey Brandon (Richard Coogan) out of his hair so he sets up a rather intricate plot of framing him. Malone gets "model" Carol Hudson (Mamie Van Doren) to come into town and lie that Brandon tried to extort her during a bust. Thankfully, the department is prone to believing the testimony of floozies over their most decorated cop and Brandon is fired. So he sets out to get his revenge and receives an unlikely ally in Carol after her teenage sister is raped by one of Malone's hoods. (IMDB udar55)
The "use of wire for sound recording continued into the 1960s in Protona's Minifon miniature recorders, in which the importance of maximizing recording time in a minimum of space outweighed other considerations. For any given level of audio quality, the nearly hair-thin wire had the advantage that it was a much more compact storage medium than tape."