Services were more eventful than normal Saturday evening at Pathway Church.
Church officials noticed a parked vehicle towing a trailer with two non-responsive occupants and called 911 at about 5:30 p.m.
"They were concerned for their safety," Police Chief Billy Cordell said.
Burleson police, firefighters and MedStar responded to find the occupants non-responsive, and eventually got them to respond.
"We didn't know why they were non-responsive when we arrived," Cordell said.
The passenger was transported to a Fort Worth hospital for treatment of an unknown medical condition. The reason both occupants were non-responsive does not appear to simply be related to dehydration or heat exhaustion, Cordell said, suggesting it may possibly have been because of drug use.
Police then noticed a vehicle identification plate for the trailer on the seat of the vehicle.
"You're not supposed to take a VIN plate off a vehicle for any reason," Cordell said. "We became concerned about that."
The driver was arrested for the removed VIN plate. Police are continuing to research the VIN number to determine if the trailer might potentially be stolen.
The Tri-County Auto Theft Task Force would likely be called to investigate the trailer, Cordell said.
The identities of the occupants of the vehicle were unknown at the time of this report. The passenger would likely be treated and released, Cordell said, because "generally the driver is the one responsible for the vehicle."