Marijuana could be to blame for rise in New York City murders, says NYPD commissioner

“The seemingly innocent drug that’s been legalized around the country,” he said about a possible cause in the spike in murders. “In this city, people are killing each other over marijuana more so than anything that we had to deal with (in the) 80s and 90s with heroin and cocaine...In some instances, it’s a causal factor. But it’s an influence in almost everything that we do here.”