Dane Cook's half brother - who was also his business manager - has been arrested for allegedly embezzling upwards of $10 million from the celebrity.

Darryl McCauley was charged with three counts of larceny and forgery for bilking the unfunny comedian and alleged actor. Authorities made the arrest after searching his Wilmington, Mass., home and discovered more than $800,000 - in $100 bills.

Massachusetts State Police authorities allege Cook's brother was busted after his latest heist, in which stole the money they old fashioned way - forging a $3 million check from Dane and depositing it in his account. Simple, really.

McCauley, who has been in charge of Dane Cook's financial affairs since his early career in the 1990s, when he merely a little-known unfunny comedian, will be arraigned on Wednesday in Woburn District Court in Massachusetts.

He has surrendered his passport and is being held on $3 million bail. Authorities continue to investigate McCauley, who will return to court in Boston January 15.

We don't know what's more upsetting here - that some guy would actually do this to his own brother, or that Dane Cook possessed $10 million dollars.