Update: Tweedy has reportedly been found alive.

Todd Tweedy, CEO of Audience Machine and author of an upcoming Wiley book Facebook Marketing Secrets is missing. The last known communication from him is a status update on Facebook on Tuesday, which said:

One illness I’ve never been able to defeat is my own depression. I have to say goodbye now. I wish each of you a wonderful New Year!

His bio at Audience Machine says:

As CEO of Audience Machine, Todd Tweedy is responsible delivering technology-enabled community marketing and search engine marketing services to achieve cost-effective online customer acquisition and revenue goals.

Todd is a big-picture technology-driven marketing geek with documented ability to drive strong acquisition growth and online sales. Vast e-commerce experience from airline reservation systems to book sales and from affiliate marketing to viral and social networking over 16 years with B2C & B2B leadership for startups, ad agencies as well as Fortune 500 firms.

He lives in St. Paul Minnesota with his wife and three children, according to that bio. A CBS Minnesota report (via Marketing Land) says the Bureau of Criminal Apprehension is involved in the search Tweedy. It says:

The Bureau of Criminal Apprehension described Tweedy as 6 feet, 3 inches tall with brown hair and brown eyes. The BCA said Tweedy may be driving a red Volkswagen Passat with the license place 545 BLM.

Anyone with information about his whereabouts is asked to contact St. Paul Police at 651-266-5612.

Many have chimed into comment on his Faceboo posts, showing their support and offering help – including people who claim not to know him personally.

On Twitter, the hashtag #FindTodd is being used to spread awareness and to help locate him.