BILLINGS, MONT. • The boyfriend of Gabby Petito, whose body was found at a national park in Wyoming after a cross country trip with him, has been charged with unauthorized use of a debit card as searchers continue looking for him in Florida swampland, federal authorities announced Thursday.

A federal grand jury indictment filed in U.S. District Court in Wyoming alleges Brian Laundrie made unauthorized withdrawals or charges worth more than $1,000 during the period in which Petito went missing.

It does not say who the card issued by Capital One Bank belonged to.

FBI Special Agent in Charge Michael Schneider said an arrest warrant issued Wednesday for the alleged fraudulent use of the bank card will allow law enforcement across the country to continue pursuing Laundrie, while the investigation continues into Petito’s homicide.

Laundrie has been named a person of interest in the case.