Mark Patrick Nielsen was born on March 17, 1953. Family members reported him missing on January 19, 1995.
Nielsen had been living in Los Osos and was last seen on October 10, 1994. An investigation into his disappearance yielded no results.
At the time of his disappearance, Nielsen was described as 5'8" tall and 185 pounds, with brown hair and blue eyes. He also went by the nickname "Sharky."
California Dept. of Justice Missing Person Search