The mother of a missing man in Garrison gave an update to News 12 about the latest search on Sunday in Manhattan to find her missing 26-year-old son.

Jeanne-Marie Fleming said her son, Colin Marma, is a vulnerable adult who has struggled with mental health in the past.

He was last seen on Feb. 2 wearing black pants, a black sweatshirt, a black beret and red sneakers.

While his car was found in Manhattan with his phone in it, Fleming said there's been no activity on her son's accounts since the night of Feb. 2 when he bought a drink at Blessed Bar & Kitchen in Hamilton Heights.

It was part of the reason why Sunday's search had volunteers spread out all over the borough, begging people to help look for him.

"My sister and I started downtown at Battery Park," Fleming said "She wanted to look down by the water."

Fleming and her sister then made their way to Washington Square Park. She added that her husband and her brother-in-law looked in Times Square and the Port Authority, before heading up towards Hamilton Heights and the George Washington Bridge.

"We were thinking about it the other night, 'Did he go on the bridge? Did he leave New York?" Fleming said.

Fleming added that they're now trying to get security footage of the bridge and check out its structure.

"One of the police officers said if someone's bound and determined they could go over, but it's pretty difficult the way it's designed right now," Fleming said.

Despite all of the destinations that the group visited on Sunday, Fleming added that they still don't have any more information about Marma's whereabouts.

She said they are currently just focused on staying positive and doing what they can to bring him home.

"It feels good to be out there looking and trying to raise awareness to as many people as we can," Fleming said.

Fleming told News 12 that they'll head back to Manhattan on Friday or Saturday to continue their search.

They are welcoming volunteers who want to help them.