Hospital spokeswoman Katie Ratchford says the baby is in critical condition.
Tufano says the shooting was the result of a domestic dispute, and investigators are searching for a suspect. Tufano did not elaborate.
He says the teen's foster mother went home after walking Wright to the bus stop. The foster mother heard gunshots and came out to find the teen in the street.
The girl attended an alternative school with a special program for pregnant teens.