The woman was taken to an area hospital and is expected to live.
The March 1st shooting in the 2700 block of Accomac took the life of 20-year-old Nicholas Kapusniak of Waukesha, Wisconsin.
St. Louis police are searching for gray Chrysler 200 in connection with the crime.
A teen was among two people shot just before 10 p.m. at Mimika Avenue and West Florissant Avenue. He was in a vehicle with six others.
Police say one man was struck in the head, the other in the chest around 1 p.m. in the 4300 block of Lee Avenue.
One man was left in serious but stable condition after an early morning drive-by shooting.
Police say drive-by shooting also left a man critically-injured.
Police identified the victim as 17-year-old Destinee Clemons.
In all, eight people were shot, three were critically wounded, the others conditions are listed as serious and stable.
The woman claims that while stopped on the Poplar Street Bridge, someone drove by and shot her son in the leg as he was checking the tire.