Sisayehiticha Dinssa, an unemployed U.S. citizen, was arrested Tuesday after a dog caught the scent of narcotics on cash he was carrying, according to an affidavit filed in court.

When agents asked him if he had any cash to declare, he said he had $18,000, authorities said. But when agents checked his luggage, they found an additional $59,000. When they scrolled through his laptop, they said they found the mysterious files.

At a court hearing Wednesday, Dinssa was ordered held in custody until at least until Monday at the request of prosecutors.

Assistant U.S. Attorney Leonid Feller argued Dinssa was a potential risk to the community and federal agents want to get a warrant to search his computer more thoroughly, The Detroit News reported Thursday. U.S. Magistrate Donald Scheer approved Feller's request to detain him.

Dinssa, who is from Dallas, arrived in Detroit from Nigeria by way of Amsterdam and was headed for Phoenix, Feller said. He is charged with concealing more than $10,000 in his luggage, which carries a maximum penalty of five years in prison, the Detroit Free Press reported.

A message seeking comment was left Thursday with his lawyer, Leroy Soles.