Mark Patrick Nielsen was 41 years old when he was last seen in San Luis Obispo County, California, on October 10, 1994. A resident of Los Osos, he has not been heard from since that day. His family officially reported him as a missing person on January 19, 1995, more than three months after his disappearance. There is limited information available regarding the circumstances of his case.
At the time he went missing, Nielsen was described as a White male with brown hair and blue eyes, standing at 5'8" and weighing 185 pounds. He was reportedly wearing a jean jacket, a white t-shirt, and jeans. Nielsen also went by the nickname "Sharky".
The San Luis Obispo County Sheriff's Department is the investigating agency for Nielsen's case. His case is classified as a missing person, and his information has been entered into national databases, including the National Crime Information Center and the National Missing and Unidentified Persons System. Despite these efforts, his case remains unresolved, and he has now been missing for several decades.Last Seen: Oct 10, 1994
