Police confirm the teen turned himself in Friday night at police headquarters, accompanied by his mother and attorney.
The unidentified teen is charged with murder and carrying a pistol without a permit.
The arrest comes nearly a month after Richardson was gunned down on Catherine Street in the Hollow neighborhood, directly behind the Greene Homes community, where the suspect formerly resided.
Detectives have not released a motive for the shooting.
The teen is scheduled to appear in juvenile court Monday.
"We feel strongly that this is a great case and that it will result in a conviction," said Bridgeport Police Detective Jeffrey Holtz following the suspect's surrender at police headquarters.
The incident marks the city's fifth homicide of the year, according to police.
Anyone with information about the case is asked to contact Detective Thomas Harper at (203) 581-5239.