Jessy Kurczewski was a Wisconsin woman convicted in 2023 for the first-degree intentional homicide of her friend, Lynn Hernan, for whom she had been acting as a caregiver. In October 2018, Kurczewski reported finding Hernan unresponsive in her home, initially suggesting the death was a result of a self-inflicted overdose. However, investigations and toxicology reports later determined that the death was a homicide caused by poisoning.

Nanette Johnston (now Nanette Packard) orchestrated the 1994 murder of her millionaire fiancé, Bill McLaughlin, to secure a $1 million life insurance payout and hide her extensive embezzlement of his funds. While living with McLaughlin in Newport Beach, she maintained a secret affair with former NFL player Eric Naposki and provided him with a house key and his schedule to facilitate the shooting.

Malcolm Webster, a British nurse dubbed the "Black Widower," was convicted in 2011 for the 1994 murder of his first wife, Claire Morris, and the 1999 attempted murder of his second wife, Felicity Drumm, both staged as car accidents to claim life insurance money. Operating as a calculated, financially-driven sociopath, Webster drugged his victims and attempted to kill them on different continents to fund an affluent lifestyle, eventually defrauding his second wife of her savings.