Prosecutors say a local San Diego sheriff’s deputy, who claimed he had suffered a back injury but may have been seen working out with heavy weights as a gym, has been charged with committing workers compensation insurance fraud resulting in $57,000 in losses.

According to the story in the San Diego Union Tribune, Matthew Tobolsky, 40, faces 14 counts including insurance fraud, filing a false claim, attempted perjury and failing to disclose information that affects a payment. The charges carry a potential sentence of up to 15 years in custody, which would most likely be served in county jail.

Tobolsky has not yet had an opportunity to enter a plea in the case. He is scheduled to be arraigned in San Diego Superior Court Wednesday afternoon.

According to the District Attorney’s Office, Tobolsky claimed in January that he had injured his back from lifting two five-gallon water bottles. But an investigation, initiated by the Sheriff’s Department, indicated Tobolsky had misrepresented his physical condition and what he could or could not do.

Authorities said Tobolsky told medical professionals that he was suffering from debilitating pain and was unable to do light duty on the job. But the investigation revealed he was able to work out with weights at a gym.

Of the $57,000 in losses, $46,000 was paid directly to the defendant, prosecutors said.

The Sheriff’s Department investigated the case will help from the state Department of Insurance and the District Attorney’s Office’s Insurance Fraud Division.