Former "Star Trek" star Walter Koenig said his son Andrew was very despondent just before he disappeared, and a letter written by the actor best known for his role as Boner on "Growing Pains" just before his disappearance raised a red flag.

In a statement on the official Koenig Web site, the family acknowledges media reports that Andrew Koenig was depressed when he disappeared. The last time the family heard from Andrew was on Feb. 9, and the last time his phone received a text was Feb. 16 in Vancouver. The family says there was "bank activity" in Vancouver the same day, but didn't disclose what kind of activity it was.

Andrew's phone has been turned off since then, and police, family and friends are trying to find him. A Feb. 16 letter from Andrew to his father apparently made the older Koenig concerned, especially after his father realized Andrew had sold or given away a number of his possessions before flying to Canada. Andrew also refused a job, saying he "wasn't going to work anymore," according to the site.

The Koenig family said Andrew had recently finished a trailer for a feature film he wanted to direct, and was actually in Canada visiting friends. He had first traveled to Toronto, but then made the cross-country trip to Vancouver, where he felt comfortable since his days filming an episode of "21 Jump Street."

The Koenigs added that they don't believe there was a specific incident that prompted Andrew's disappearance.

"I think it's something that has been a part of his makeup for a long time," Walter Koenig said in a statement. "There's no single trauma. There's no episode. There's nothing of that nature," including the use of drugs, as some have speculated.

Andrew Koenig is described as white, 5-foot-5, 135 pounds, with long, brown shoulder-length hair and brown eyes. He was last seen at a baker in the Stanley Park area of Vancouver, where he often took walks, the family said.

Anyone with information is asked to contact Det. Raymond Payette of the Vancouver Police Department at (604) 717-2534.