Possible DC plane crash wreckage found by man walking his dog

A man walking his dog along the Potomac River in Northern Virginia on Sunday found what appears to be an airplane seat and a tray table among other airplane debris.

The National Transportation Safety Board is now examining the debris, which is believed to be from the mid-air collision between an American Airlines regional jet and an Army Black Hawk helicopter near Reagan National Airport in January that killed 67 people.

Andrew Guevara, who lives near the trail along the Potomac River, said he spotted the airline seat cushion while walking his dog.

SEE ALSO:NTSB finds Army chopper in fatal midair crash with plane was above altitude limit

"It kind of caught my eye, so I kept on looking at it. And, you know, your brain's trying to put two and two together," Guevara told ABC News. He said he noticed the lock mechanism that looked like a tray table, the rectangular pocket at the bottom and the curvature of the headrest.

"It just kind of just struck me that that's what it could be, and knowing what happened back in January, I kind of logically drew the conclusion that it would be," Guevara said.

The Alexandria, Virginia, Police Department confirmed it was called for the report of wreckage in the Potomac and that the debris was taken into custody by the D.C. Harbor Patrol.

The D.C. police were notified and are now coordinating with the NTSB to transfer the possession of the wreckage to the agency, the department said.

"We are taking possession of the item and will evaluate it and store it until it can be transferred to the remainder of the wreckage from the DCA midair accident. If any additional wreckage is located, it will undergo the same process," the NTSB said in a statement to ABC.

Guevara said he wanted to make sure the apparent wreckage made it to the right place.

"It's part of, not only an investigation, but it's part of the unfortunate events that happened back in January," he said. "So I just wanted to make sure that those pieces aren't just left there."

Guevara's discovery was first reported by local D.C. station Fox 5 DC.