Let’s stop rumors
http://www.berkeleyside.com/2017/01/28/carbon-monoxide-laser-cutter-may-caused-mysterious-deaths-berkeley-home/
Does a laser cutter produce carbon monoxide? I know that cutting some materials can be dangerous.
Cutting plastics can create all kinds of harmful chemicals.
Cutting materials could produce CO, but I do not think it can produce it in the quantities needed for CO poisoning. Especially because you produce CO in an incomplete burn, and you want your laser to burn well, and thus usually have extra air flow to assist in burning.
I will be dead since 5 years ago
Polyamide powder (assuming SLS) can produce hydrogen cyanide if burned. CO has already been ruled out.
The latest articles say CO poisoning was ruled out in the autopsy, and the coroner has ordered a full toxicology report (which may take weeks).
@Ryan_Carlyle do you have a link to that? The articles I have found indicate that a CO leak from the gas company was ruled out, and that toxicology was ordered. Boingboing seems to say that toxicology came back and did indicate CO poisoning, but I can’t find any other source reporting the same thing.
@James_Kao http://www.eastbaytimes.com/2017/01/25/berkeley-toxicology-tests-ordered-in-couples-death/
Says “carbon monoxide poisoning has also been ruled out” but I guess it doesn’t specify if it was ruled out specifically by the autopsy or something else.
A “CO leak from the gas company” wouldn’t make any sense. Gas company delivers natural gas, not carbon monoxide 
Do you mean the gas company ruled out malfunctioning gas-burning devices producing CO?
Misbehaving gas heating system is the nr1 source of CO related deaths. And those systems are rented from the gas company in some occasions. (No idea how common this is in the US)
I would be surprised if an apartment in the San Fran area had gas heat, but anything’s possible I suppose. Could have been an oven issue.