A Matamoros man is behind bars in the Rio Grande Valley after a K-9 officer foiled his alleged attempt to smuggle cocaine into the United States.

U.S. Customs and Border Protection (CBP) officers arrested 27-year-old Leonel Martinez-Mancilla on Tuesday.

Court records show that Martinez-Mancilla drove up from Mexico in a Ford Focus at Brownsville's B&M International bridge.

Customs officers sent his car to secondary inspection where a K-9 officer detected something suspicious in the dashboard.

Authorities found six bundles with 12.9 pounds of cocaine worth $413,000 dollars inside.

Martinez-Mancilla appeared before U.S. Magistrate Judge Ronald Morgan on Thursday morning.

Investigators said Martinez-Mancilla is a Mexican national who lives in Matamoros.

Judge Morgan denied bond for Martinez-Mancilla until a Tuesday afternoon hearing.