Going back to the search warrant at the residence - would a gas leak cause any other type of posoning other than carbon monoxide?
Genuinely asking because I don't really know and I apologize if this has already been touched on and I missed it somehow.
According to the search warrant - Detective Roy Arndt "..learned New Mexico Gas Company responded to the residence and was conducting active testing on the gas line in and around the residence.."
An affidavit from a Santa Fe County detective described how deputies found the bodies of Gene Hackman and his wife, Betsy Arakawa, on Wednesday.
www.nytimes.com
It doesn't say if it was routine testing or if there was a reason behind them testing the lines. I am also assuming that they didn't respond due to the deaths but I reckon that that could also be a reason for them responding.
JMO.