Interrogation Droid

Although they often participate in interrogations, so-called interrogation droids rarely ask the questions. The name is just a euphemism for their true purpose: inflicting pain. These sadistic designs specialize in administering mind-altering “truth serums” or applying agonizing but non-lethal damage to biological beings. They typically lack any kind of personality programming, or strong safety protocols.

~ Source: Star Wars: The Old Republic Encyclopedia