What type of evidence may be analyzed to determine a person's drug use at the time of death?

Biological evidence is crucial in forensic investigations to ascertain a person's drug use at the time of death. This type of evidence includes bodily fluids such as blood, urine, and saliva, all of which can be tested for the presence of drugs and their metabolites. By analyzing these substances, forensic toxicologists can identify specific drugs that were present in the individual's system and establish a timeline for their use, providing vital information about the circumstances surrounding the death.

Biological evidence offers quantifiable data that can directly indicate intoxication levels and drug interactions at the time of death, making it essential for understanding the immediate causes and contributing factors related to the person's demise. This allows investigators to build a more complete picture of the events leading up to the death, which is often crucial in legal and medical contexts.