McCarthy was joined by other police officers, clergy and community members at a news conference Friday morning at the city's Ogden District police station.
It comes as police and federal officials also announced separate charges against nine people accused of selling heroin within 1,000 feet of a school.
The two-month Narcotics Division investigation was initiated following a homicide near 1900 S. Troy.
Police say the market was operated by the New Breeds street gang.
Police seized say they heroin, crack cocaine and cannabis. A semi-automatic pistol was also seized with illegal money and two stolen vehicles, police said. One suspect is still on the loose, police said.
The following were arrested or are wanted on warrants in connection with this investigation:
Rodney Feagin, 25, In Custody, Delivery/ Possession of a Controlled Substance
Earl Hopson, 25, In Custody, Delivery of a Controlled Substance
Louis Poole, 17, In Custody, Delivery of a Controlled Substance
Lionel Caldwell, 54, In Custody, Delivery of a Controlled Substance
William Robinson, 50, In Custody, Delivery of a Controlled Substance
Elijah Mims, 27, In Custody, Delivery of a Controlled Substance
Kelsey Garner, 24, In Custody, Delivery of a Controlled Substance
Jeffery Rice, 29, In Custody, Delivery of a Controlled Substance
Eugene McGee, 54, In Custody, Delivery of a Controlled Substance
Jarrett Watson, 26, Wanted, Delivery of a Controlled Substance
