Dennis John Luttropp was 72 when he was last seen on November 2, 2010, in Oakland, California. He is described as a Caucasian male, 5 feet 4 inches tall, about 130 pounds, with gray or partially gray hair.

His case remains open and he appears in missing person databases such as NamUs. Family and law enforcement have been appealing to the public for any tips that could help locate him.

If anyone has information about where Dennis was on or after November 2, 2010, or remembers seeing him in Oakland around that time, please contact the authorities handling the case.