Sounds like he was moving a LOT of product in the Chicago area. And based on when he signed with the Bears and when this activity started...he didn't waste any time.

Apparently, Chicago Bears receiver Sam Hurd's close personal proximity to Tim Tebow last Sunday in the Bears' overtime loss to the Denver Broncos did nothing to clean up Hurd's act. As reported by many sources, but perhaps the most up-to-date fashion by Sean Jensen of the Chicago Sun-Times, Hurd was busted on Wednesady by undercover Homeland Security agents after attempting to set up regular purchases of marijuana and cocaine to expand a drug sale system that he already had going.

More at the link
Bears WR Sam Hurd busted by federal agents in ongoing drug distribution ring - Shutdown Corner - NFL*Blog - Yahoo! Sports