Gabby Petito’s boyfriend Brian Laundrie declared a person of interest

The boyfriend of missing Long Island woman Gabby Petito has been identified as a person of interest in her mysterious disappearance, police said Wednesday.

Brian Laundrie, who returned home to North Port, Fla., on his own after the couple went on a cross-country trip, has lawyered up and refused to cooperate with police.

Petito, 22, has been missing since late last month.

“As a father, I can imagine the pain and suffering Gabby’s family is going through,” North Port Police Chief Todd Garrison said in a statement.

“We are pleading with anyone, including Brian, to share information with us on her whereabouts in the past weeks,” Garrison said. “The lack of information from Brian is hindering this investigation.

“We will help find Gabby and we will help find anyone who may be involved in her disappearance,” the chief said.

Gabby Petito and Brian Laundrie are seen in Instagram posts.Instagram

The North Port department is the lead agency in the investigation, and the FBI and Suffolk County police are also involved.