DENVER (AP) - Colorado's top law enforcement official says the state is doing a good job keeping legal marijuana from flowing beyond its borders despite an indictment alleging 32 people exported tons of the drug to other states over four years.

Attorney General Cynthia Coffman said Thursday that the indictment shows authorities are policing those who exploit the state's legal pot industry for criminal gain. Authorities say the group falsely posed as medical marijuana caregivers and earned about $12 million. Coffman says they shipped tens of thousands of pounds of marijuana outside Colorado, mostly to Minnesota.

Authorities say one of those charged used planes from his skydiving business for pot shipments.

Officials say a growing number of criminals are moving to Colorado believing they can hide inside the state's commercial marijuana industry.