Fentanyl

Speculation is running rampant about the sudden death of pioneering Memphis rapper Lola "Gangsta Boo" Mitchell. Here's what we know.

Several "drug crew" members have been arrested for allegedly selling the deadly batch of fentanyl-laced heroin from which actor Michael K. Williams overdosed. The feds credit video surveillance footage of the drug deal to help arrest four men.

Actor Michael K. Williams' death, which was ruled an accident, was caused by the lethal combination of fentanyl, p-fluorofentanyl, heroin and cocaine, the New York City Medical Examiner's Office confirmed.

According to the CBP, there were 2.85 kilos of fentanyl hidden in wooden boxes, enough to potentially kill hundreds of thousands of people.

In an indication of how strong the drugs were that likely killed comedian Fuquan Johnson, Kate Quigley -- the one person who survived the overdoses -- is having problems staying "lucid," her mother said.

Fentanyl is a highly addictive synthetic opioid that is prescribed by doctors to rid breakthrough pain from medical procedures or cancer patients

Authorities are looking into the theory that Prince was unaware of the toxicity of the pills at the time of death.

The report, released by the Midwest Medical Examiner's office, shows Prince self-administered the opioid, which is allegedly fifty times more potent than heroin.