Dreaming of unknown person dying is very bad omen as dream meaning and interpretation. It usually means accident in which you will be a witness or you will have lucky escape. It also means facing unexpected problems due to someone else. It also means you causing some kind of mishap. Dreams of unknown person dying and you are in a totally unknown place means problems during travel.
Dreaming of unknown person dying and you see colors or bright light means you will face some tragedy in personal life especially death or accident of a family member in immediate future.
Dream of unknown person dying and you are happy means someone you had trusted might cheat you. It can be spouse or friend or relative. It also means you intelligence getting clouded by jealousy or hatred.
Dreaming of unknown person dying is also a warning to not to trust people blindly and to do your work on your own. The dream also wants you be careful with all your activities and friendships as depending too much on others is not good.