Deputies arrested Mark Derksen of Fountain Hills, and say he was selling heroin, meth and prescription drugs to people of all ages.
As a pastor, Derksen, 63, worked with youth groups and senior citizens.
Although his Faith Mountain Christian Church in Fountain Hills is closed, Derksen was still active in the community.
After receiving tips about Derksen, the Maricopa County Sheriff’s Office put together an undercover sting operation in which deputies were able to buy drugs. Investigators say they witnessed 30 other people buy drugs at the pastor’s apartment in a single day.