Authorities say 19-year-old Clayton Gravenhise is charged with the August killing of a man in a Brooklyn liquor store.
He is also charged with the July killing of an 18-year-old woman in Bedford-Stuyvesant.
Apparently, Gravenhise thought both were involved with the murder of his brother, but police say both people were innocent and had nothing to do with that crime.
The first incident happened just before 1:30 a.m. on July 13. Officers responded to the vicinity of Quincy Street and Marcy Avenue to a report of shots fired. There, they found 18-year-old Beverly Turner with multiple gunshot wounds about the body lying on the ground.
EMS rushed her to Kings County Hospital, where she later succumbed to her injuries.
Then, just after 11 p.m. on August 29, shots were fired into the liquor store on Stone Avenue in the Brownsville section. Jahzeph Crooks, 19, sustained gunshot wounds to the head and knee and later died at the hospital. A 20-year-old woman was also wounded in to the right ankle.
Gravenhise is charged with two counts of second-degree murder, one count of second-degree attempted murder and two counts of criminal possession of a weapon.