Updated

A Massachusetts woman who authorities say posed as a teenage boy to prey on a West Virginia girl could face up to 30 years in prison.

Twenty-five-year-old Carissa Hads, of Quincy, pleaded guilty Wednesday in a Clarksburg court to a federal count of traveling across state lines with the intention of having sex with a minor.

Investigators say Hads pretended to be an 18-year-old boy on MySpace and started a relationship with the teenage victim in 2010. Authorities say they communicated for more than a year before their first in-person meeting.

A State Police investigator says Hads wore a back brace to cover her chest, and that she visited the 15-year-old at least three times.

The criminal complaint says Hads had one sexual encounter with the girl but did not undress.