Maalik Mitchell, center left, sheds tears as he says goodbye to his father, Calvin Munerlyn, during a vigil Sunday, May 3, 2020, in Flint, Mich.  Munerlyn was shot and killed Friday at a Family Dollar store in Flint. He'd worked at the store as a security guard for a little more than one year. (Jake May/The Flint Journal via AP)
Maalik Mitchell, center left, sheds tears as he says goodbye to his father, Calvin Munerlyn, during a vigil Sunday, May 3, 2020, in Flint, Mich. Munerlyn was shot and killed Friday at a Family Dollar store in Flint. He'd worked at the store as a security guard for a little more than one year. (Jake May/The Flint Journal via AP)

Keep shoppers safe and follow the rules. Calvin Munerlyn was doing his job when he lost his life in an altercation outside a Flint Family Dollar.

TUESDAY, MICHIGAN — Local security guard 43-year-old Calvin Munerlyn was murdered Friday while working as a security guard at a local Family Dollar. Three people have been charged in the fatal shooting at the store just north of downtown Flint.

The altercation began after Munerlyn told a customer she needed to leave the store because she was wearing a mask, according to Genesee County Prosecutor David Leyton. Governor Gretchen Whitmer’s latest executive order requires all Michiganders to wear masks in public to prevent the spread of COVID-19

A woman, her adult son and her husband have been charged in the guard’s death. 

Sharmel Teague, 45, argued with Munerlyn when her adult daughter was asked to leave the store, before leaving. Two men later came to the store. Munerlyn was reportedly shot in the back of the head.

Teague’s daughter has not been charged in the shooting.

“It is important that the governor’s order be respected and adhered to, and for someone to lose their life over it is beyond comprehension,” Leyton said earlier Monday in a statement.

On Thursday, gun-carrying protesters and other demonstrators rallied inside the state Capitol, calling for coronavirus-related restrictions to be lifted. Some protesters with guns — which are allowed in the statehouse — went to the Senate gallery. Some senators wore bulletproof vests.

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As of Monday, Michigan has reported 43,754 confirmed COVID-19 virus cases and 4,049 deaths due to complications from the disease.

“The hostile tone that we have seen in recent days on television and in social media can permeate our society in ways we sometimes don’t fully realize or anticipate,” Leyton told reporters Monday. “Decisions like staying home when we can, wearing a mask when going to the store and staying a safe distance from those around us — these should not be political arguments. They don’t necessitate acts of defiance, and we simply cannot devolve into an us versus them mentality.”

About 150 people attended a candlelight vigil Sunday night. On Monday, a makeshift memorial was started outside the Family Dollar.

Munerlyn’s mother, Bernadett, said she wants justice for her son.

“They didn’t have to take my baby and it wasn’t that serious,” she said. “All you people just have to do is listen to the law, listen to the governor. Just stay home. If you don’t have to come out, then you wouldn’t need a mask unless you’re out getting groceries or necessities. All my baby was doing was his job working and doing his job.”

Governor Whitmer offered her condolences.

“It is incredibly sad that in this crisis that this life was lost,” Whitmer told reporters Monday. “We are mindful of how important it is that people keep a level head, that we do the right things protecting ourselves and protecting others.”

The Associated Press contributed to this story.