The plot thickens...
4. Rotten Eggs (SULPHUR SMELL)
The smell of rotten eggs is instantly recognizable, and can be an indicator of a serious problem in your home. The two most common sources of a rotten egg smell are a natural gas leak, and escaping sewer gas.
In its natural state, natural gas is actually odorless. That’s why utility companies inject a substance called mercaptan, which emits an odor that smells like sulfur or rotten eggs. If there’s a very strong smell, you could have a substantial natural gas leak. Leave the area, call 911 from a safe place, and call your utility company so they can send out a technician as well. It’s also important not to smoke or use matches or lighters, because natural gas is flammable.
If you detect a faint smell of rotten eggs on occasion, you may have a leak of sewer gas, which contains toxic elements including hydrogen sulfide and methane. Often the source of sewer gas is a bathroom that isn’t used very often. The pipes under a shower or sink have a u-shaped trap where water usually blocks sewer gas from leaking back into a home. To create that barrier, simply pour a cup of water into the bathroom drain. If you can’t find the source of the sewer gas leak in your plumbing, the issue could be a vent pipe, which disperses sewer gas through a home’s roof. If you can’t find the source, simply call a home inspector or plumber to investigate.
http://stormguardrestoration.com/top-five-smells-concerned-home/
Plumbing problems in Trump Tower! Clogged traps! How mundane! That only happens in my world, the real world!
Problems with an unlit gas stove would make sense, especially if it were a sad case of suicide. Since he used drugs, it could just be an unattended unlit burner. Did Trump Tower have gas ranges and dryers? Or were they electric?
If the fire rapidly spread to the entire floor, and there was a smell of sulpher.....could be a gas leak and explosion/fire.
Some years ago a "mega-mansion" was exploded, reduced to wood splinters by filling it with propane and touching off the propane/air mixture.
One of the reasons H2S is so dangerous is because it is lethal at low doses AND it deadens the sense of smell once it exceeds about 15-20 parts per million (ppm) and is immediately dangerous to life and health (IDLH) at 100 ppm. The lethal dose at which 50% (LD50) of rats exposed to it die is 356 ppm for a 4 hour exposure period.