HK-series Droid
this ancient model of Hunter-Killer assassin droid was developed by Czerka Corporation during the decades leading up to the Great Sith War, some 4,000 years prior to the Battle of Yavin. The primary mission of the HK-series was the infiltration of corporate rivals in order to eliminate executives. The HK-47 lacked any sort of grace in its programming, and would level an entire building - killing all inside - in order to achieve its goals. This set of characteristics lead to the HK-series being banned in many systems.