Authorities say the incident took place early Thursday morning in the 400 block of Granville Drive.
An investigation revealed that the girl was at a party and had been drinking alcohol. Several others who were under the legal drinking age were also drinking at the party, say police.
The girl fell down the home’s staircase and was rushed to the hospital, where she’s now in critical condition.
A criminal investigation has been launched, but no charges have yet been filed in the matter.