Another feature could be the motives behind their actions. It's often money, revenge, or power that drives them. For example, a business rival might hire a hitman to eliminate competition. Also, there is often a complex network of people involved, from those who hire the hitmen to those who help them carry out the deed, like providing weapons or false identities.
In a 'hitman true story', the investigation process by the authorities is also a key aspect. Detectives have to piece together small clues, follow leads, and sometimes use undercover operations to catch the hitman. There are also legal aspects, like building a case strong enough to convict the hitman, which can be challenging due to the secretive nature of their operations.
One main feature is the secrecy involved. Hitmen usually operate in the shadows, so uncovering the truth about their actions is difficult.