The type of homicide least likely to be cleared is: domestic workplace friends and acquaintances robbery

The answer is: Robbery

Homicide that involved domestic, workplace f, riends and acquaintances tend to be cleared easily because the police can know which individuals are involved in the case.

In most robbery cases, the perpretors are not someone that the victims know and the robbers might come from the same area as the victims. Because of this, Robbery became least likely to be cleared compared to other options.