Officers were called around 12:20 a.m. June 6 on a report of multiple people shot, LMPD spokesman John Bradley said at the time.
He is charged with murder and possession of a gun by a convicted felon.
Nequell Beason, 19, was arrested Tuesday.
When police arrived on scene, they found a man on the sidewalk who had been shot outside a home.
LMPD arrested 20-year-old Damari Walls-Medlock on Thursday.
Police responded to a shooting at South 23rd Street and West Ormsby Avenue, near Wilson Avenue, around 1 p.m.
Mitchell said both were transported to University Hospital, but died of their injuries.
Judge declines to lower bond for man accused of chaining naked woman to floor inside Louisville home
A prosecutor said Moises May has a domestic violence conviction from 2006 out of Alabama and would be a flight risk as he is wanted by the U.S. Immigration and Customs Enforcement and U.S. Marshals Service because he is not a legal resident.
LMPD said it is considered a death investigation.
Keystone Learning Academy prepares kids for Kindergarten on South 13th Street near Algonquin Parkway.