Assassin droids were a type of droid built specifically for the purpose of assassination. They were independently programmed, answering to no masters, but could be programmed to serve one or more masters. The company Holowan Laboratories produced a model of assassin droid known as the IG-86 sentinel droid, which were used as enforcers by criminal elements. Other assassin droids included the BT-1 assassin droids and 0-0-0 produced by the Galactic Empire's Tarkin Initiative, and the droid bounty hunters IG-88 and IG-90.
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