While not attributing a cause of death, a Chautauqua County police incident report and supplemental "Overdose Follow Up" report said Carter, identified by her married name of Leslie B. Ashton, had suffered an overdose and was taking the prescription medications Olanzapine, Cyclobenzaprine (muscle relaxer) and Alprazolam (Xanax).
These may include serum BSL if olanzapine has previously been prescribed, thyroid function if lithium has previously been taken to rule out hypothyroidism, liver function tests if chlorpromazine has been prescribed, CPK levels to exclude neuroleptic malignant syndrome, and a urinalysis and serum toxicology screening if substance use is suspected.