John Wesley Ewell (born March 25, 1957) is an American serial killer and former activist who murdered four residents of the Hawthorne neighborhood in Los Angeles in 2010. Ewell had previous convictions for violent crimes dating back to the 1980s, and in the 1990s and 2000s he advocated against California's "3-strikes law". During his time advocating, he appeared in a 2006 episode of The Montel Williams Show to express his opinion. Following a guilty plea in 2019, he was sentenced to four consecutive life terms without parole.