YOUNGSTOWN — Samuel D. Arroyo, 18, has been indicted on four counts of aggravated robbery, each with a firearm specification, in the late July 19 back-to-back robberies of people in downtown Youngstown.

If convicted, Arroyo could get more than 40 years in prison. Arroyo’s only address is the Mahoning County jail, according to court records.

A Youngstown police report states that officers were called to West Federal Street and Symphony Place at 11:41 p.m. for a man and woman who had been robbed. Officers spoke to two sets of victims, who both said they were robbed by a light-skinned man wearing black clothing and a ski mask.

The first couple said they were walking east on West Federal Street near Hazel Street when they were approached by the man, who pointed a handgun at them and demanded “all you got.”

He took a black shoulder bag from the man that had the word “murder” in white embroidery on it. The bag contained a wallet, car keys, two debit cards and a Republic of South Korea identification card. The suspect then fled west on West Federal and north on North Hazel Street, where he encountered two other people and robbed them also, the report states.

The suspect was described in the same way as the other couple described him. He also pointed a gun at them and told them to “give it up.” They handed over a white purse containing an iPhone in a yellow flower case, debit card and keys to a Toyota.

The man gave up his iPhone and an Ohio state-issued identification card. The suspect then fled north on North Hazel Street. Officers started checking the area, and one officer found the white purse in the parking lot near the Social Club on nearby Commerce Street.

As officers spoke to one set of victims at West Federal and Hazel streets, they observed Arroyo walking toward them westbound on West Federal Street, and he matched the description of the suspect. He was wearing the black shoulder bag with the word “murder” on it.

Officers took Arroyo into custody. The other set of victims returned to the area where the officers and Arroyo were and told officers they saw the suspect again after they were robbed. He was near the intersection of Phelps and Commerce streets.

They lost sight of the suspect, then saw that he was with officers, they said. Officers found a handgun and marijuana in the black bag, as well as stolen items. Arroyo also had a black ski mask in his pocket.

Others indicted Thursday are:

* Frank Little, 33, Everett Avenue, Poland, domestic violence and obstructing official business.

* Nicholas A. Calloway, 45, Mahoning County jail, three counts of being a felon in possession of a firearm and single counts of receiving stolen property, fentanyl-related compound possession, obstructing official business and resisting arrest.

* Neil R. Kennedy, 52, Mahoning County jail, two counts each of tampering with records, forgery and identity fraud and one count of possessing criminal tools.

* Whittington R. Davis, 37., North Feederle Drive SE, Warren, felonious assault and obstructing official business.

* Aaron J. McCrory, 21, Pittsburg Avenue, Girard, arson.

* Craig R. Kroner, 43, Warner Road Northeast, Brookfield, tampering with evidence, aggravated drug possession, obstructing official business, resisting arrest and illegal use or possession of drug paraphernalia.

* Lakeisha D. Blackshear, 46, Mount Vernon Avenue, fentanyl-related compound possession and obstructing official business.

* Troy S. Stack, 24, Thalia Avenue, Boardman, breaking and entering and misdemeanor theft.

* Nikki S. Welsh, 32, Knox School Road, Alliance, aggravated drug possession.

* Christian A. Oliver, 30, Jean Street, attempted fentanyl-related compound trafficking, attempted cocaine trafficking, fentanyl-related compound possession and cocaine possession.

* William A. Stanely, 50, Labelle Avenue, cocaine possession, drug possession and obstructing official business.

* Jacob R. Smith, 24, Bedford Road, Masury, failure to provide a change of address.

* Sean S. Mills, 34, West Ohio Avenue, Sebring, failure to register.

* Dae’ Shawn A. Douglas, 21, Tyrell Street, failure to register.

* Robert M. Simon, 63, Center Road, Poland, grand theft of a motor vehicle and grand theft.

* Gregory M. Dombrowski, 37, Cranberry Run Drive, Boardman, grand theft of a motor vehicle and theft.

* Terrance L. Jefferies, 64, Mahoning County jail, rape and compelling prostitution.

* Mildred Woods, 47, Mahoning County jail, rape, trafficking in persons — commercial sex acts; and two counts of compelling prostitution.

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