A 12-year-old girl in Connecticut died in March with a lethal dose of diphenhydramine in her system. The girl, found unresponsive at her home, had a level of the medication, commonly known as Benadryl, that was fatal. The girl's body was discovered on her bedroom floor, with pills found nearby.

Her mother had last seen her the previous evening, when she was in her locked bedroom. The mother attempted to wake her the next morning, but received no response and had to use a tool to open the door. Further details about the incident are available from the source, including information from search warrants and the investigation by Enfield Police.