DoDamageBy
From the Scripting Manual
procedure DoDamageBy(ID,Shooter: Byte; Damage: Integer); Parameter Info: ID (Byte): Player ID to do damage to. Shooter (Byte): Player ID doing damage. Damage (Integer): Amount of damage to do (4000 to get a definate kill) Description: This function will do damage to the specified player.
Examples
begin
DoDamageBy(1,2,4000); //Instantly kill player 1 (Will appear as 'Killed by Player 2')
end;