This 2005 photo provided by U.S. Drug Enforcement Administration officials shows puppies rescued from a farm in Colombia destined for use by a U.S. veterinarian working for a Colombian drug trafficking ring. Veterinarian Andres Lopez Elorza used the puppies to smuggle packets of liquid heroin on commercial flights to New York City, where the heroin packets were eventually cut out of the puppies, who died in the process, according to officials. Lopez, who is Venezuelan, was arrested in 2015 in Spain in connection with the case and was extradited to the U.S. on Monday, April 30, 2018. He is scheduled to be arraigned Tuesday, May 1 in New York. (U.S. Drug Enforcement Administration via AP)
NEW YORK — A veterinarian pleaded not guilty on Tuesday to U.S. charges that he turned puppies into drug couriers for a Colombian trafficking ring by stitching packets of liquid heroin into their bodies.