Close 'Gray death' opioid can kill with single dose Experts say a new drug known as 'gray death' is 10,000 times more potent than morphine and a 100 times more powerful than Fentanyl. (5/9/17 6PM) KHOU 11:52 AM. EDT May 10, 2017 TRENDING VIDEOS Six teen boys killed in one afternoon in Fulton County Four Langston Hughes students killed in crash Her son was gunned down. Now she needs your help. Missing 81-year-old man found dead 2 women, infant killed in Hall County crash Two teen brothers killed in Roswell accident Man accused of Stolen Valor: 'I don't recall' Friends, family in shock after accident that killed 4 Brothers killed by school bus crash 'kind, compassionate, special' Fans excited for April the giraffe's calf More Stories Kids caught in the crossfire May 23, 2017, 5:04 p.m. EXCLUSIVE POLL | 6th district voters split on Trump effect May 23, 2017, 4:55 p.m. How Atlanta drivers are getting the boot May 23, 2017, 1:50 p.m.