The incident happened outside Shooters sports bar in Mariners Harbor early Sunday morning.
Police say 32-year-old Baydr Taylor is an ex-convict. Eyewitnesses say he wore a bullet proof vest to the crowded bar.
He was not able to get in and allegedly shot 31-year-old Yolanda Mapp when she told him to calm down.
Mapp is the mother of a teenage son. She was last reported in critical condition.