By Suzanne Le Mignot

CHICAGO (CBS) — Chicago Police have a person of interest in custody being questioned for two shootings early Tuesday morning.

Police say a man walked into a store at 63rd and Western and fatally shot the clerk. A few hours later, they say the same gunman opened fire on Broadway and Wilson, wounding one person.

Tuesday evening, police said the believed they found the suspect’s car in the 3000 block of West Armitage.

Police say the man tried to leave the without paying for merchandise. When the store clerk tried to block him from leaving, the man shot the store clerk dead.

The second shooting happened in front of an Uptown McDonald’s. People working in the mini strip mall say Brion Payne, 50, had just hurried out of a Dunkin’ Donuts, when he was shot by someone in the head. Some of the stores with surveillance cameras captured the father of 10 being shot. The video has been turned over to police. Payne is currently in critical condition.

“He’s a good dad and we just want to find who did this and bring him to justice,” said Tshayna Culpepper, Payne’s daughter.

“He’d come home every day from work, spend time with his kids, go to work, come home. I don’t know why somebody would do this to him,” said Jessica Rosado, Payne’s girlfriend.

Michael Alexander witnessed the aftermath of the shooting.

“There were cops swarming and ambulance , there were EMT’s attending to the gentlemen I think that was shot. I mean I could see him clearly, but it was just mayhem here this morning,” said Alexander.

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