DURHAM — A grand jury has indicted Ivan Cervantes Damian on charges he held a 15-year-old girl captive for more than 18 months and forced her to have sex.

Damian, 30, faces charges of first-degree statutory sex offense, human trafficking and forcing a child into sexual servitude.

Authorities accuse Damian of having sex with the teenage girl between December 2008 and August 2009. They also accuse him of holding the victim in servitude from December 2008 to July 2010.

"He alienated her from society," said Durham Police Cpl. Marty Walkowe.

Walkowe said the relationship began as a voluntary one while the couple was still living in Mexico. When they immigrated a couple of years ago, Walkowe said, Damian violated North Carolina's human trafficking law by bringing a minor from another nation into the state.

"Even though his girlfriend left voluntarily, because she was a minor, it's human trafficking," Walkowe said. "It sounds like a big organized thing, but it was actually just her voluntarily coming from Mexico with him to here."

Walkowe said the victim reported Damian to police after their relationship soured and she wanted to leave.

Damian is being held at the Durham County Detention Center on $250,000 bail. The federal Immigration and Customs Enforcement agency has also asked that he be held for processing on potential immigration violations.

jesse.deconto@newsobserver.com or 919-932-8760