Police discovered pills containing heroin laced with an extremely powerful elephant tranquilizer at or near the El Jebel-area home where two men were found dead last month, according to a lab test from the Colorado Bureau of Investigation obtained by The Aspen Times.

Law enforcement officials seized nine clear capsules from the scene in the Blue Lake subdivision that each contained an off-white powder, according to an email from the Eagle County Sheriff’s Office distributed to other area law enforcement agencies.

The CBI lab report dated April 13 analyzed the pills and found they contained a mixture of heroin and carfentanil, the email states. The report also warns law enforcement officers to be careful when responding to overdose calls “because a small amount of this drug can be deadly.”

Officers should always wear gloves when dealing with unknown powders because carfentanil can be absorbed through the skin or inhaled, and the best practice is not to field test any powders, the email states.

Read the rest of the story at The Aspen Times.