A teen is behind bars after he allegedly had sex with a 13-year-old girl he met at a party.
Pharr police responded to a call on the 700 block of La Quinta Drive in Pharr Sunday morning.
Documents state that the mother and the victim told police that Rigoberto Castillo sexually assaulted the girl.
According to Pharr police, the girl ran away from home, and went to a party with friends the day before.
The 13-year-old returned home Sunday morning.
The victim TMs mother said her daughter had a swollen lip and a hickey on her chest.
Authorities said 17-year-old Castillo admitted he had sex with the underage girl.
Castillo told police the sexual act was consensual.
A judge arraigned the teen, and charged him with aggravated sexual assault.
A bond of $10,000 was set for Castillo.