Ronald David Kruska was last seen hitchhiking in Los Angeles, California on October 10, 1978, after he left his home in Canyon Country. A friend dropped him off at Interstate 5. He has never been heard from again. On the day of Kruska's disappearance, he found out he had a different father than his siblings, and became extremely upset and left home. His family initially assumed he had left of his own accord and would return, but they became concerned after months passed without his making contact with them. He has a dragon tattoo on his upper right arm with Japanese lettering and a viking warrior tattoo on his left arm.