|This needs a stretch.|
Theodore Avocados was the father of George Avocados.
He was arrested for diamond theft, but the diamond was never found.
Scooby-Doo! Mystery Incorporated
Daphne Blake discovered his old diary in a secret cave. It contained a confession that he had stolen the diamond and hid it as one of the many crystal doorknobs in Crystal Cove. (The Secret Of The Ghost Rig)