I was once questioned in a murder case that turned out to be a drug overdose.
I didn't know the girl, but I knew her husband who had just gotten out of jail and had run into him at a convenience store a couple days before she turned up dead.
An Investigator came to my house, I asked a bunch of questions, told him I did run into the guy and didn't remember what we talked about.
I then told him "I don't have any hard evidence, but I'm pretty sure my ex-wife did it."
She never went to jail, but it was worth a shot.
True story.
