A Providence man stopped Thursday evening for a minor traffic violation on Columbia Road near the Southeast Expressway turned out to have 18 kilograms (40 pounds) of cocaine and 13 kilograms (29 pounds) of heroin in his rented SUV, the Suffolk County District Attorney's office reports.

When police stopped Santo Gonzalez, also known as Orlando Lopez, a license check showed the Suburban was an overdue rental, the DA's office reports.

A routine search before it was towed back to Thrifty Rental uncovered the drugs, prosecutors say.

A Dorchester District Court judge on Thursday ordered Gonzalez held in lieu of $500,000 bail following his arraignment on drug trafficking charges.