Dragnet
This is an early episode of Dragnet.
The the first episode of the television show Dragnet, originally aired December 14, 1951 when I was about to turn 8-years old.
Via regular broadcast TV or via online streaming, I have probably seen every episode of Dragnet at least twice, if not more.
In this episode, a woman was strangled in a hotel room,
Friday and Smith investigate.
In the beginning, they have no leads, no witnesses and no clues.
But as usual, the crime gets solved and the criminal brought to justice.