The FBI issued an arrest warrant for Brian Laundrie, the missing fiancé of Gabby Petito, on Thursday.
Authorities recovered Petito's body in Wyoming earlier this week.
Until now, Laundrie had been a person-of-interest in her disappearance after the two went on a cross-country trip. Laundrie returned home in her van on Sept. 1, alone.
The warrant charges Laundrie with "unauthorized access devices" related to his activities following the death of Gabrielle Petito, the FBI wrote in a statement.
Federal investigators say Laundrie used a Capitol One debit card and PIN without authorization to buy at least $1,000 worth of items in Wyoming and elsewhere between Aug. 30 and Sept. 1.
"While this warrant allows law enforcement to arrest Mr. Laundrie the FBI and our partners across the country continue to investigate the facts and circumstances of Ms. Petito's homicide," said FBI Denver Special Agent in Charge Michael Schneider.
"We urge individuals with knowledge of Mr. Laundrie's role in this matter or his current whereabouts to contact the FBI. No piece of information is too small or inconsequential to support our efforts in this investigation."
North Port Police and a number of law enforcement agencies are searching the Carlton Reserve for Laundrie. He reportedly visited the area week ago to go hiking.