Derrick Aidan Kwan, 27, disappeared after leaving his family’s home in Diamond Bar, California, on March 27, 2022, to hike in the Lake Arrowhead area. He was last seen at about 11 a.m. wearing a black t-shirt and shorts. His silver Toyota was later found abandoned near Highway 138 and Crestline with minor damage from hitting a guardrail.

Witnesses said a man matching Kwan’s description ran from the crash site into nearby woods carrying two large bags. Kwan was an experienced hiker but had been struggling with mental health issues before he disappeared. Extensive searches by family, friends, and authorities have not turned up significant clues, and his family does not believe he left voluntarily.

If anyone was in the Lake Arrowhead or Highway 138 and Crestline area on March 27, 2022, and saw someone matching Derrick’s description or noticed anything unusual, please share what you remember.