[dice7]

Check if the player, when dies, is in his own turf. If he is, then the player who killed him will start a gang war

https://sampwiki.blast.hk/wiki/GangZoneFlashForAll
https://sampwiki.blast.hk/wiki/GangZoneStopFlashForAll
https://sampwiki.blast.hk/wiki/SetTimer or https://sampwiki.blast.hk/wiki/SetTimerEx

Set a timer, check how many kills will be, the player with the most kills will get the turf when the timer ends

Check other scripts for more detail information