Youngwood Fire Chief Lloyd Crago tells the Pittsburgh Tribune-Review the crash happened about 9:50 p.m. Saturday on Route 119, when the woman's car rear-ended a Jeep.
Crago says people who lived nearby saw the woman try to run away and held her down until state police arrived.
State police Trooper Steven Limani says police aren't identifying the woman until their investigation is complete. The little girl was referred to Westmoreland County child welfare workers.
Crago says the driver couldn't explain her erratic driving or lack of pants. Emergency crews found two bottles of liquor from her vehicle, one of which was empty.
