Looks like the suspicions about Hawkins were right. From the LA Times:

Taylor Hawkins, the drummer for multiplatinum rock band Foo Fighters, had an assortment of drugs in his system when he died Friday, Colombian authorities said.

An initial forensic medical examination and urine toxicology report of the musician’s body revealed 10 substances in his system, including THC (marijuana), tricyclic antidepressants, benzodiazepines and opioids, according to a statement from the Colombian attorney general’s office Saturday via Twitter.

Emergency services responded to a call of a patient with chest pains at the Four Seasons Hotel Casa Medina Bogota on Friday. Hawkins was found dead in the hotel room, the authorities said. A spokesman for Foo Fighters was not immediately available for comment.