After exposure to unknown substance, 3 dead in New Mexico and first responders decontaminated

TL;DR

-- Three people are dead and more than a dozen first responders were quarantined and being treated Wednesday for exposure to an unidentified substance after being called to a suspected drug overdose at a rural New Mexico home, authorities said. New Mexico State Police said three of the four people who were found unresponsive inside the home east of Albuquerque died. The fourth was being treated at a hospital in Albuquerque.