Robert Hansen (Robert Christian Hansen) was a serial killer, who between 1980 and 1983 murdered between 17 and 21 people near Anchorage, Alaska. Hansen was born in Estherville, Iowa, to Christian and Edna Hansen. Hansen's father was a Danish immigrant baker and he worked in his father's bakery as a youth. It is theorized that Hansen began killing prostitutes around 1980. After paying women for their services, he would kidnap, torture, and rape them, further binding and flying them to his cabin in the Knik River Valley in his private airplane. Once there, he would release his victim on a river sandbar, stalk and then kill them with a hunting knife or carbine as they fled through the woods. Apprehended in 1983, Hansen was convicted in 1984 and sentenced to 461 years plus life, without chance of parole. He was imprisoned at Spring Creek Correctional Center in Seward, Alaska. The Hansen case served as inspiration for the action thriller Naked Fear (2007).