Bobby Fuller was a rising star in the rock n roll world in the 1960s. His band, The Bobby Fuller Four, had already charted on the Billboard Top 40 several times. When he was found dead in his car, the police ruled it suicide. No one believed this conclusion.

Sources:

I Fought the Law: The Life and Strange Death of Bobby Fuller by Miriam Linna

Unsolved Mysteries: Episode 3

The Mysterious Death Of Bobby Fuller

Was The Death Of Rising Rock Legend Bobby Fuller Really An Accident?

50 Years Ago: 'I Fought the Law' Singer Bobby Fuller Dies Mysteriously

The short life and mysterious death of Bobby Fuller, rock'n'roll king of Texas | Pop and rock | The Guardian