He Walked By Night - 1948 - 7/10

A beat cop accidentally interrupts a burglar and is killed for his interference.
Police manhunt of the cop killer is no mere procedural.
For one thing, the killer / thief is smart. Really smart.
He has devised a homemade radio set to eavesdrop on the police radio channel.
His patterns of crime, he changes those to muddy the trail.
Moody photography, eerie use of the Los Angeles sewer system.
Richard Basehart starred in several Noirs, this one of his best.
Audio commentary by film historians worth listening to, as well.