Ellen Goldberg, NBCDFW.com
Dozens of customers are volunteering their time to take orders, flip burgers and wait tables to keep Bacon and Friends.
Dallas police say they believe they have a strong lead in the slaying of the owner of a Mesquite restaurant.
Police said Cheung put in a full 12-hour day at his restaurant, Bacon and Friends, before he was killed in the parking lot of his apartment complex on Skillman Avenue in Dallas early Sunday.
"I think, it's dark, it's late at night, he saw someone getting out of a car, thought they were vulnerable and took advantage of him," Deputy Chief Craig Miller said.
Officers found Cheung in the back seat of his car. He had been shot in the head, and his wallet was missing.
"Right now, we don't have any reason to believe the motive is anything other than robbery," Miller said.
The surveillance video shows the man walking with a noticeable limp.
"He has no enemy at all," said his mother, Jenny Cheung. "This is not fair."
And if losing a son isn't hard enough, she said she is worried that she may also lose his beloved restaurant.
"I thought I would close because I lost the head chef," she said.
But regulars are determined to keep Bacon and Friends open. Dozens of customers are volunteering their time to take orders, flip burgers and wait tables.
"We're trying to help it live on," said Dave Fritsch, who eats at Bacon and Friends about four times per week. "We're giving Aaron's parents a chance to get their feet under them, to keep things going and let people know that Aaron's dream is going to continue."
The Cheungs said Monday and Tuesday were some of the restaurant's busiest days since it opened two years ago.
Crime Stoppers is offering a $5,000 reward for information that leads to an arrest in the case.