Robert Michael Spector, 18, was one of four young men killed in Henry Cowell Redwoods State Park on February 10, 1973. Spector, from Van Nuys, California, had been camping with friends when a man later identified as Herbert Mullin approached, said he was a park ranger and ordered them to leave. When they refused, Mullin returned the next day and fatally shot Spector and three companions — David Allan Oliker, 18; Brian Scott Card, 19; and Mark John Dreibelbis, 15. Their bodies were not found until February 17, 1973.

Spector was the son of Dr. Donald E. Spector and Ruth Kessler and was survived by sisters Laurie and Andrea. Mullin was arrested soon after and charged in a series of killings around Santa Cruz County.

Did anyone who knew Robert or his camping group ever hear about plans for that trip or see them in the days before February 10?