Police Officer Katie Flood said Wednesday that a man dressed as a guard walked into the financial office of the Berean Church on Tuesday and told an employee he was there to pick up the weekly deposit.
The employee said the man appeared to know what he was doing, so she gave him the deposit of more than $145,000 in cash and checks.
The real armored car and driver arrived about 15 minutes later and church employees realized they had been robbed.
Flood said no one saw what vehicle the fake guard used.
The nondenominational Berean Church has more than 7,000 members and 20 pastors.