She was admitted, but died at hospital at approximately 1:30 a.m. Sunday.
Early Sunday morning police arrested 19-year-old Cory L. Barbour, of the 100 block of Chestnut Crossing Drive in Newark, in connection with the crime.
When officers arrived, Barbour was at the house and subsequently brought to County Police Headquarters. Officers also found a .357 revolver in the bedroom where Lee was found.
Lee lived in the home with her mother, another adult woman and the female's three children whose ages are 16, 13 and 7. The adults were not home at the time of the incident.
The three children, Lee and Barbour were in the residence at the time of the incident. Barbour is an acquaintance of Lee's, and had been visiting since approximately noon.
Police say Barbour had brought the revolver with him.
Lee, Barbour and the 16-year-old were in the bedroom talking. For unknown reasons, Barbour then pulled the revolver out of his waist band, discharging the gun once and striking Lee in the head.
Barbor is prohibited from possessing a firearm due to prior felony convictions.
Barbor is charged with Manslaughter, Possession of a Firearm During the Commission of a Felony, Possession of a Firearm by a Person Prohibited and two counts of Endangering the Welfare of a Child. He was arraigned and committed to the Howard Young Correctional Institute in lieu of $140,000 cash only bond. He was also ordered by the Court to not have contact with any of the Lee's family or any residents in the home.
