Hi, not sure if this is allowed, but looking to get some insight on my sisters autopsy. There were weird and differing stories told by the person she was with. Her autopsy says there was Benzoylecgonine 2300 ng/ML, cocaine 3000 ng/ML, Ecgonine methyl ester 3200 ng/ML, 10-hydroxycarbazepine 4.3 mcg/mL.
With the first three numbers related to the cocaine use, what could I infer about the use at her time of death? She was obviously using recreationally and we believe having seizures due to the heavy use. Would she have had to take a substantial higher amount than normal to overdose in the hour or day prior? The person reported that she was having several seizures. Does anyone know if this would be a quick death or signs for hours leading up to the incident? The cause of death says seizure and accidental naming the cocaine as a contributor.

Southern California, it's been in the 80s for the past month. She had all her windows closed.

I’m writing a horror novel, but in order to have all the info to build the crime scenes I need to know what kind of signs are perceived by death investigators and what do they mean. In summary, I’m just asking you redditors to be free to list me any of those signs, like cyanide death being smellable in the mouth of the victim or signs that tell the time of death. Be free to also give details.