[itsCody]

killerid=65535 = invalid killer id

PHP код:

public OnPlayerDeath(playerid, killerid, reason)
{
    if(killerid != INVALID_PLAYER_ID
    {
        // do stuff
    }
    return 1;
} 


100% cpu could result in a lot of things..
timers, unoptimized code, etc

or something running on background on your server?