Which type of murder is considered the most difficult to solve due to its lack of motive?

Random killing is considered the most difficult type of murder to solve primarily because it often lacks a clear motive or connection between the perpetrator and the victim. In cases of random killing, the offender typically selects their victim without any prior relationship or specific intent beyond committing the crime, which can make it challenging for investigators to establish a motive or link to the suspect. This randomness can result in a lack of leads and witnesses, further complicating the investigation.

In contrast, other types of murder, such as revenge killing or spousal murder, typically involve some underlying motive or personal connection that investigators can explore. These motives can provide investigators with potential suspects and a clearer path for establishing relationships among the individuals involved. Planned murders often involve premeditation and can also provide clues based on the methods employed. Therefore, while all homicides can pose challenges for investigators, the unpredictable nature of a random killing makes it particularly difficult to solve.