Recommended reading - 711 - Officer Needs Help by Whit Masterson (1965):

711 - Officer Needs Help

By Whit Masterson.

Filmed as Warning Shot (1967), directed by Buzz Kulik.

ASIN: B000CC6L22

Published by Popular Library.

First published 1965.

Paperback.

Description:

A Man on the run for his life...

A suspense novel to startle and shock...

Detective Sergeant Tom Valens was a tough man in a tough business--with an unblemished record, a long scar in his gut to prove his integrity and a beautiful ex-wife to prove his devotion to the Force.

Then one night he made a cop's worst mistake--and found himself alone, with ten days to clear his name and save his life. Ten chilling days which led to a gorgeous redhead named Liz, a secret potent enough to blow half of Los Angeles society sky-high, and a psychotic killer who would stop at nothing...including triple murder.