Zeganitian "Wardolls". These hardy (albeit expensive) droids are equipped with a robust sensory suite, a fairly simple AI control system, and six mag-linked arm segments with hardlight emitters. While the militarized and swat variants also possess small-diameter plasma cannons on each arm segment, the police and security versions instead have simple tasers and stun beams.
Wardolls are capable of rapid and accurate target acquisition far beyond the capabilities of most organics, terrifying feats of physical prowess, and are notoriously difficult to render inoperative. Even without plasma cannons, wardolls are capable of "throwing" their arm segments with enough force to break through concrete, shatter doors into splinters, flip small cars, and more.
The use of wardolls by the police is highly controversial, seen by many as equivalent to the police having a goddamn tank. In fact, the use of heavy weaponry by criminals, such as explosives, has been seen to increase proportionately with police use of wardolls, resulting in more and more collateral damage to neighborhoods.