[Jstylezzz]

pawn Код:

public OnPlayerDeath(playerid, killerid, reason)
{
    SetPlayerWantedLevel(killerid,random(5)); //Replace 'random(5)' with the level you want to give the player
}

Simple as that.

EDIT: Btw, some links for reference

• OnPlayerDeath
• SetPlayerWantedLevel