If he goes, it'll be

• "Suicide"

• Disappearance

• Murder with no obvious motive or uncaught perpetrator with no or weak motive

• Hit and run, no leads

• Alone, crashed car into tree on empty highway

• Killed in custody

• Etc, including other methods which could easily disguise an attack or silencing

Non suspicious ways:

• Disease

• Traffic accident with cars having a dashcam and footage, etc

• Still alive at end of market

This may be subjective but I'll try my best to judge fairly.