Jane Hamsher is a US film producer, author, and blogger best known as the author of Killer Instinct, a memoir about co-producing the 1994 movie Natural Born Killers with Don Murphy and others, and as the founder and publisher of the politically progressive blog FireDogLake. With Murphy, she also co-produced the subsequent films Apt Pupil (1998), Permanent Midnight (1998), and From Hell (2001). A contributor to The Huffington Post, she posts also in websites and political magazines, such as AlterNet and The American Prospect.

Natural Born Killers is a 1994 American romantic crime action film directed by Oliver Stone and starring Woody Harrelson, Juliette Lewis, Robert Downey Jr., Tommy Lee Jones, and Tom Sizemore. The film tells the story of two victims of traumatic childhoods who become lovers and mass murderers, and are irresponsibly glorified by the mass media.