BOSTON (CBS) —  Police have arrested and charged a 25-year-old Lynn man in connection with a Roxbury shooting that critically wounded a store clerk. Stephon Samuel faces multiple charges including armed robbery and armed assault with intent to murder, the Boston Police Department announced Friday.

Stephon Samuel (Photo credit: Brockton police)

On July 14, 21-year-old Tanjim Siam was working at the M & R convenience store when a man came in with a gun and demanded cash and cigarettes. Officers said Siam handed everything over, but the robber shot him in the head.

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Since then, Siam has been on life support at Boston Medical Center. His family arrived from Bangladesh this week to see him for the first time since the shooting.

Tanjim Siam (Image credit Facebook)

A spokesperson for the family said Siam’s prognosis is not good.

“The family sat down with the doctors (Tuesday), so within a couple of days, his family has to make tough decisions. That’s all so far, we know, and they are very, very, emotionally very stressed,” said family spokesperson, and secretary of the Boston Convenience Store Owners Association, Humayun Morshed. “They said thank you so much, especially to the media, Boston Police who catch this guy, Mayor Marty Walsh and both senators who helped them to get a visa to come here.”

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“I hope this will help the victim’s family – Tanjim’s family – a little bit,” store owner Abdul Matin said of the arrest.

Mary Quirk, a regular customer of the store who arrived as Siam was being brought out of the store on a stretcher said she considered him a friend. “He was a happy kid,” she said. “He would turn around and help you in whatever way you needed it.”

The Boston Convenience Store Owners Association created a GoFundMe page to help Siam and his family. Boston Mayor Marty Walsh and Police Commissioner William Gross have condemned the shooting as “cowardly.”

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Samuel was arrested Friday following an investigation by Boston police, Brockton police and the FBI. He’s currently at the Plymouth County House of Corrections on unrelated charges.