"You can't miss his smile. You can't ever mistake a smile," Jennifer Chevalier said.
Chevalier says she won't stop searching for her 22-year-old son. Christopher Muir Davis has been missing since mid-March.
"Just dead ends everywhere," Chevalier said. "Somebody always sees him and nobody's seen him at all."
She says mother's intuition is telling her something is really wrong.
"He's not a loner and he would not leave without saying goodbye. That's not his style," Chevalier said.
On Tuesday morning, the Vermont State police put out a press release pleading for the public's help. Police said Davis was probably on foot and his cellphone had been switched off.
"They haven't seen him in two weeks and like I said, that's out of character for him and they're concerned. We're concerned," Vt. State Police Det. Sgt. Jim Claremont said.
By Tuesday afternoon, State police changed their tune. They issued a second press release, this time saying Davis was not only missing but considered a person of interest in the March 29 armed robbery at the Champlain Farms in Swanton.
Det. Sgt. Jim Claremont: We sent out the missing person bulletin because we were looking for him because he's missing. And then when the questions came up we said, yes, he is a person of interest in the Swanton robbery.
Reporter Jennifer Reading: "But you knew that he was a person of interest in the Swanton robbery when that missing person press release went out?
Police say at this point they're not sure if Davis is dangerous or if he's even the armed suspect in surveillance photos. But they do believe he may have information about the crime.
"We're just looking to talk to Chris," Claremont said. "I don't know if he has a drug past, but I'm fairly certain that drugs were involved with the Swanton robbery."
"Before he went missing he was involved with stuff that he really shouldn't have been involved with. People make mistakes and he made a mistake," said Samantha Jo Assisi, Davis' girlfriend.
Assisi says drugs were dragging Davis down. And now she's worried that that may be the reason he's missing.
"I don't want people to think badly of him because of that," Chevalier said. "I want him to be found safe. And if there's anything wrong, he knows that we're out to help him out."
If anyone has seen or heard from Davis in the last few weeks, they're urged to call the Vermont State police.
Police are calling Davis a person of interest in the Swanton robbery, and while they're working closely with St. Albans police, they say there is no direct evidence linking Davis to a string of armed muggings there. However, they're not ruling out the possibility. They hope to make contact with him to clear up some of those details.