A college student from Prince George's County was charged yesterday with first-degree murder in the death of her baby, who police believe was born in a bathroom on the Villa Julie College campus in Baltimore County.

Police found the newborn girl in a storm drain in Prince George's on Oct. 4, the day after Danielle Eboni Riley, 21, allegedly gave birth to the child. Detectives believe Riley drove the baby to her parents' home in Clinton and dropped her 10 feet into the drain.

Riley turned herself in to police yesterday and was being held last night at the Baltimore County Detention Center for Women, said Baltimore County police spokesman Bill Toohey.

The state medical examiner has ruled the death a homicide, according to police. The cause of death was determined to be asphyxia, blunt force, head injury and environmental exposure.

The investigation began Oct. 3, when police were called to the Campus Circle Building, a student residence hall at the Owings Mills college.

A roommate of Riley's reported that when she tried to get into the bathroom earlier in the day, Riley locked the door and said she was sick. The roommate thought she heard the weak cries of an infant and later found blood in the bathroom and in Riley's bedroom, according to police.

Police began searching for Riley and tracked her to her family's home in the 5700 block of Garden Drive in Clinton. Police found the baby wrapped in a plastic bag in a storm drain next to the home.

Riley's mother told investigators that her daughter admitted that she gave birth the day before and put the baby in the storm drain.