The Willingboro convenience store worker fatally shot during a robbery Wednesday had come to America several years ago for better opportunities, and was sending money back to his family in Ghana, the store's owner said Friday.

Matthew Mwinsori, 32, of Willingboro, was shot around 8:20 p.m. outside the Quick N Go in the 100 block of Dr. Martin Luther King Jr. Boulevard. Investigators on Friday were still looking for the shooter, who was seen entering the store on surveillance video.

Sunny Singh, owner of the store, said Mwinsori had worked there and at a gas station Singh owns for almost a year, and that Mwinsori was closing out when the robbery occurred.

Singh said Mwinsori had a young daughter in Ghana.

"It shook me," Singh said of the slaying. "It's a big shock for me, because I never had this problem before, and the guy was such a nice guy, and he was working very hard."

Singh said the store had never been robbed before. The robber stole more than $1,700, he said.

Authorities said the shooter entered the store and that he and Mwinsori then walked out to the parking lot, where the shooting occurred. Mwinsori was pronounced dead about an hour later at Lourdes Medical Center of Burlington County.

The man, believed to be in his 20s or 30s, was wearing a black mask over the top part of his face, a light-colored hoodie under a blue-gray sweater, and red sneakers, authorities said.

Anyone with information about the case is being asked to call Burlington County Central Communication at 609-267-8300, authorities said.

mboren@phillynews.com 856-779-3829 @borenmc