The boyfriend of a South Carolina nurse whose body was found months after her disappearance was arrested Monday and charged with murder, authorities said.

Deputies used cell phone data to place 28-year-old Jamel Good near a remote location where Maria Fernandez's remains were discovered last month, Union County Sheriff David Taylor said.

He said authorities have not yet determined how the woman was killed and urged anyone with information to come forward.

"It's an ongoing investigation," Taylor said.

Good was being held in a county jail, but no bond hearing has yet been scheduled.

An attorney who represented Good during earlier police questioning did not immediately return a call from The Associated Press.

Authorities said Fernandez disappeared last Sept. 3 and local reports quoted authorities as saying she had been seen outside Good's home that day.

A utility worker found Fernandez's skeletal remains in a wooded area of Union County, authorities said, adding dental records and DNA were used to identify her.

Family members criticized law enforcement's handling of the case last year after months passed without leads into the disappearance.

Taylor said Monday that the investigation has been thorough.

"This has been a trying time. It's been a trying case for law enforcement," said Taylor, a newly elected sheriff who took office Jan. 6.