A look at the roots of the historic music scene in L.A.’s Laurel Canyon featuring the music of iconic music groups such as The Byrds, The Beach Boys, Buffalo Springfield, and The Mamas and the Papas.

Backup singers live in a world that lies just beyond the spotlight. Their voices bring harmony to the biggest bands in popular music, but we’ve had no idea who these singers are or what lives they lead, until now.

This investigation examines the mysterious shooting of soul icon Sam Cooke, whose death silenced one of the most vital voices in the civil rights movement.