Drug-Drop-FeaturedWARRENTON, Mo. (AP) — Authorities say a St. Louis-area man wrote his own name and address on an envelope he used to send a painkiller to a jailed inmate.

Warren County prosecutors have charged 58-year-old Kenneth Dufrenne of St. Charles with felony drug distribution.

Investigators say in a probable-cause statement included in court records that Dufrenne alleged put six squared strips underneath three stamps on an envelope last November.

Authorities allegedly had the strips tested and found them to contain a controlled painkiller.

Online court records don’t show whether Dufrenne has an attorney.