Richmond police began receiving calls shortly before 12:30 p.m. reporting gunshots in the 400 block of Florida Avenue, Richmond police Detective Nicole Abetkov said.
One of the callers reported that a person was down on the ground. When officers arrived, they found Stephenson suffering from multiple gunshot wounds, Abetkov said.
He was taken to a nearby hospital, where he died from his injuries.
Police were still investigating the case today, but so far no witnesses have come forward, Abetkov said.
Stephenson was the third person to be shot to death in Richmond this week and the city's 24th homicide victim this year.
Early Monday morning, 25-year-old Rose McFadden, a mother of four young children, and 24-year-old Antoine Williams Jr. were shot to death while waiting for a gate to open to let them into the parking lot of an apartment complex in the 700 block of Nevin Avenue where McFadden lived.
Police were alerted to the shooting at about 2:40 a.m. by the city's ShotSpotter system and found McFadden dead on the sidewalk. Williams was still in the car, which had crashed through a gate and into a Dumpster, Abetkov said.
He was taken to the hospital, where he died later that day, police said.
As of today, investigators were still working to obtain surveillance video from the apartment complex, but it appears that there were no witnesses to the shooting, Abetkov said.
Investigators are urging anyone with information about either case to contact police.
Anyone with information about Stephenson's murder can call Detective Tim Gray at (510) 620-6451.
Anyone with information about McFadden and Williams' murders can call Detective Hector Esparza at (510) 620-6673.
People who wish to remain anonymous can call the Police Department's tip line at (510) 232-TIPS or send tips by text message or email to Tips2RPD@richmondpd.net.
The Police Department is offering rewards of up to $20,000 for information leading to the arrest and charging of people involved in these or other unsolved murders in the city, according to Richmond police Chief Chris Magnus.
Reward money is also available for information that helps police prevent any new murders from being committed, Magnus said.