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.

Dr. John Schneeberger, a trusted physician in Kipling, Saskatchewan, was revealed in the late 1990s to be a predator who assaulted patients and his own stepdaughter, launching a sensational true-crime case centered on an audacious forensic deception.

The Nick Perry lottery scandal, famously known as the "Triple Six Fix," was a 1980 scheme to rig the Pennsylvania Lottery’s "Daily Number". Orchestrated by beloved local TV host Nick Perry, the plan involved injecting white latex paint into all but the number 4 and 6 ping-pong balls used in the drawing, making the weighted balls too heavy to be sucked into the machine’s chute.

In 1995, McArthur Wheeler robbed two Pittsburgh banks in broad daylight without a mask, believing that smearing lemon juice on his face would render him invisible to security cameras, a misunderstanding based on the logic of invisible ink. Wheeler, who was not delusional but simply profoundly mistaken, was shocked to be arrested later that evening after his clear image appeared on local news, stating "But I wore the juice".

In January 2009, Rosa Hill and her mother, Mei Li, entered the Dublin, California, home of Hill’s estranged husband, Eric Hill, during a contested custody battle over their daughter. During the incident, the women killed Eric's 91-year-old grandmother, Selma Hill.

Stewart Parnell, the former owner and CEO of the Peanut Corporation of America (PCA), was at the center of one of the deadliest food safety scandals in U.S. history after his company knowingly shipped salmonella-tainted peanut products between 2008 and 2009.