The motivation is implied: To stop the killer from killing again. (rmfw.org)
The Campaign to Stop Killer Robots delegation includes three dozen experts, many of whom will be speaking in the formal meeting and at daily side events [PDF]. (stopkillerrobots.org)
Alone, his instincts and integrity questioned at every turn, Harriman must stop the killer before hundreds of lives, including Harriman's own, are lost. (bookbrowse.com)