A store that sold a synthetic marijuana, "Avalanche," to a young man, who later drowned the same day, has been targeted by his mother in a wrongful death lawsuit. Also sued were the manufacturers and distributors of the synthetic drug.
Source: Syracuse Post-Herald
Some synthetic drugs have been outlawed by the Drug Enforcement Administration: Feds Declare 3 Versions of Synthetic Pot Illegal.
This is not the first case where a suit has claimed that use of a synthetic marijuana caused a death: Nicholas Colbert Died After Smoking Synthetic Marijuana, Now His Mother Is Suing.