LOS ANGELES (AP) — A former Canadian Olympic snowboarder has been accused of running a drug trafficking ring that shipped large quantities of cocaine across America, killing several people in the process, authorities said Thursday.

The FBI is offering a $50,000 reward for information leading to the arrest and extradition of Ryan James Wedding, a Canadian citizen who was living in Mexico and is considered a fugitive. Wedding, 43, is charged in the United States with running a criminal enterprise, murder, conspiracy to distribute cocaine and other crimes, US prosecutors said.

U.S. authorities said Wedding’s group transported large shipments of cocaine from Colombia through Mexico and California to Canada and other locations in the United States using long-distance tractor-trailers. Wedding, a former Olympic snowboarder who is also facing years-long charges in Canada, is one of 16 people charged in connection with a ring that transported 60 tons of cocaine annually, and four of them remain on the run, said Martin Estrada, US Attorney in Los Angeles.

“He chose to become a major drug trafficker and he chose to become a murderer,” Estrada told reporters.

Krysti Hawkins, FBI special agent in charge in Los Angeles, said a dozen people have been arrested in Florida, Michigan, Canada, Colombia and Mexico in connection with the case.

U.S. authorities allege the group killed two family members and at least one other person in Canada in retaliation for a stolen drug shipment. Authorities said they seized more than $3 million worth of cocaine, weapons, ammunition, cash and cryptocurrencies in connection with their investigation.

According to authorities, Wedding competed for Canada at the 2002 Winter Olympics in Salt Lake City. In the parallel giant slalom he took 24th place.

He faces drug trafficking charges in Canada dating back to 2015, said Chris Leather, chief commissioner of the Royal Canadian Mounted Police.

“These allegations remain largely unresolved,” Leather said.

Wedding was previously convicted in the U.S. of conspiracy to distribute cocaine and was sentenced to prison in 2010, federal records show. Estrada said U.S. authorities believed Wedding resumed drug trafficking after his release and was protected by the Sinaloa Cartel in Mexico.