What Is This?!

This is an article about a worker, Marty Nesbitt, who died after falling 30 feet off a grandstand roof at a raceway in Madison County, IL. The foreman "confirmed that Nesbitt was not wearing a safety harness at the time. Nesbitt had not been working close enough to the edge for the company to consider using a monitor who could have warned him when he got too close to the edge, Gill told Wittenauer. The Occupational Safety and Health Administration is investigating the death to determine whether a monitor should have been used"

Tragic, but so far, routine. Then there's the last paragraph:

A toxicology test showed no alcohol in Nesbitt's system. Madison County Deputy Coroner Ralph Baahlmann said that at some point prior to the accident Nesbitt had used marijuana and that he may have been under the influence of marijuana at the time of the accident.

At what point prior to the incident? Minutes, days, weeks? According to whom? And is this an excuse for not having fall protection? What is this doing in the newspaper? Sounds like "blame the worker" B.S. at its worst to me.