A person of interest was in custody Monday after police discovered the bullet-riddled body of a California woman only a few miles from where she was last seen alive, KTVU reported.

Stacey Aguilar, 22, was last seen – reportedly unharmed – leaving a birthday party with her boyfriend at 11 p.m. on Feb. 13, according to ABC 7. Her boyfriend was arrested for alleged domestic violence against Aguilar when Aguilar was reported missing on Feb. 16, and though he has been questioned in her disappearance, Hayward police would not say if Aguilar’s boyfriend was the same person taken into custody in connection with her death.

Authorities did say the person in custody was being detained on an unrelated charge, NBC Bay Area reported.

“We do have a person of interest in custody,” Urban told ABC7. “We cannot release the name of the person until charges are actually brought with the district attorney.”

But police said they were confident Aguilar’s killer was locked up.

“The people in the community can sleep at night knowing there’s not a murderer on the loose,” Urban said.

Authorities found Aguilar’s body at noon on Saturday in a rural area in Fremont, just a few miles from where she was last seen. Even before finding her body, however, police on Friday classified the case as a homicide.

“The evidence indicated that this was something more than a missing person case,” Urban said, according to KRON.

The Alameda County Coroner’s Bureau found multiple gunshot wounds on Aguilar’s body and completed an autopsy, though the results have not yet been released due to the ongoing investigation.

Aguilar has a 7-year-old son who lives with Aguilar’s mom in Mexico, according to NBC Bay Area.