After her rich husband and her lover are found murdered on her living room floor, a beautiful woman must prove her innocence to avoid being murdered by the police while in custody.

I see 2 issues with the logline.

1. Mentioning on the living room floor in the logline. Not so important as to waste valuable space on.

2. The whole "in custody" part. If she was instead on the run and needing to prove her innocence or else "a crazy cop or two" may catch her and seek revenge, then we will still need to explain a damn good reason for that. IE, The Fugitive. She can break out of custody, sure, kinda like in the movie Salt, but I just don't see where the story can exist in custody for very long.

The blanket "by the police" sounds odd.

The mention of the rich husband builds intrigue and the murders. As mentioned above, "beautiful" is too generic. Think of another element in the story that describes her.

"...wannabes with zero screen credits ..."

Oh, sweet irony...

Nir Shelter:

You guru-wannabes with zero screen credits just exhaust me. You're so eager to spout your untested theories and ideas in an arena where you're not required to back your words with action and somebody else's money.?