"It is believed that in the hours after the funeral service, someone came into the funeral home and stole her remains," San Antonio police said.

The 25-year-old Texan died after a long bout with cystic fibrosis. Her funeral was August 15 at the Mission Park Funeral Chapels North.

"There wasn't any forced entry to the facility," Sgt. Javier Salazar told CNN affiliate KSAT. "So what it's believed is between the hours of 1:30 p.m., when the service ended, to about 4:30 p.m., when they locked up for the evening, someone came in and stole Ms. Mott's remains. That person remains at large."

Funeral home owner Dick Tips told the affiliate that he believes the body may have been stolen by someone who didn't support Mott's cremation, which was supposed to take place August 17.

Mott's father implored the community for help.

"We just want our daughter's remains returned so we can have some closure to our grief," Tim Mott told the affiliate.

Investigators are asking anyone with information to call San Antonio police at 210-225-TIPS (8477).

The funeral home is offering a $20,000 reward for information leading to the recovery of the remains.