STEUBENVILLE, Ohio (AP) — A judge granted two teenagers immunity from prosecution Friday before they agreed to testify about the alleged sexual assault of a drunken 16-year-old girl after a party in eastern Ohio last summer.

Both Mark Cole and Evan Westlake invoked their Fifth Amendment right against testifying for fear of self-incrimination as the trial in Steubenville entered its third day. Testimony from Cole, Westlake and a third boy are a crucial part of the state's evidence because the West Virginia girl says she doesn't remember what happened.

Trent Mays, 17, and Ma'Lik Richmond, 16, are charged with digitally penetrating the girl early in the morning of Aug. 12, first in a car and then in the basement of a house. Mays also is charged with illegal use of a minor in nudity-oriented material. The two maintain their innocence.