BALTIMORE (CBS/WJZ/AP) Baltimore police have intensified their search for Phylicia Barnes, a missing North Carolina teen who may have been abducted while visiting relatives in Baltimore.
Thus far police have no suspects and no persons of interest.
The 16-year-old was last seen Dec. 28 at her half-sister's apartment in Northwest Baltimore, reports CBS affiliate WJZ.
Baltimore police spokesman Anthony Guglielmi says there has been no sign of Barnes since she disappeared and that there has been no activity on the teen's cell phone.
"She would've used her cell phone at least once and that hasn't been the case," Guglielmi told WJZ.
Detectives involved in the investigation, who have been joined by the FBI, now fear foul play and say there is reason believe the teen may have been abducted in part because of items that she left behind at the apartment, including money.
Barnes' mother Janice Sallis has revealed additional troubling information. She told WJZ that there was a party at her 28-year-old half-daughter's apartment that involved men, alcohol, and marijuana.
"I feel that she is being sexually assaulted against her will. I feel that she is being physically abused. I feel that she could be a part of the human trafficking," Sallis told WJZ.
Police have served a search warrant at the apartment of the missing teen's half sister, but it is not clear what they were searching for.
Barnes, an honor roll student from Monroe, N.C. about 25 miles southeast of Charlotte, was on track to graduate early from a charter school and is already applying to colleges.
Sallis says Barnes was visiting three older half-siblings in Baltimore.
Baltimore Police ask if anyone has information regarding the whereabouts of Phylicia Barnes to please call the Metro Crime Stoppers at 410-276-8888.