Kill Timer when Player Death

hi, i have code when you type /tie and the player tied up, i make timer when tied player not killed in 5 minutes his got Uncuffed by Anti Tie Abuse. then how can i killtimer when the tied player died not in 5 minutes

Code:

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CMD:tie(playerid, params[])
{
        new otherid, string[120];
        if (sscanf(params, "d", otherid)) return SendClientMessage(playerid, 0xB0B0B0AA, "[SERVER]: {FFFFFF}/Tie [playerid]");
        if(!IsPlayerConnected(otherid)) return SendClientMessage(playerid, 0xB0B0B0AA, "[SERVER]: {FFFFFF}That player are not connected.");
        if(!ProxDetectorS(5.0, playerid, otherid)) return SendClientMessage(playerid, 0xB0B0B0AA, "[SERVER]: {FFFFFF}That player is not close enough.");
        if(GetPlayerTeam(otherid) == playerid) return SendClientMessage(playerid, 0xB0B0B0AA, "[SERVER]: {FFFFFF}That player are in your team!.");
        if(PlayerInfo[playerid][pRope] < 1) return SendClientMessage(playerid, 0xB0B0B0AA, "[SERVER]: {FFFFFF}You don't have any rope!.");
        if(IsPlayerCuffed(playerid) == true) return SendClientMessage(playerid, 0xB0B0B0AA, "[SERVER]: {FFFFFF}You are tied, can't use any commands");
        if(IsPlayerCuffed(otherid) == true) return SendClientMessage(playerid, 0xB0B0B0AA, "[SERVER]: {FFFFFF}That player are already tied!");
        if(IsPlayerInAnyVehicle(playerid)) return SendClientMessage(playerid, 0xB0B0B0AA, "[SERVER]: {FFFFFF}You cannot tie when you are in vehicle.");
    if(IsPlayerInAnyVehicle(otherid)) return SendClientMessage(playerid, 0xB0B0B0AA, "[SERVER]: {FFFFFF}You cannot tie that player when in vehicle.");
        {
                SetPlayerCuffed(otherid, true);
                format(string, sizeof(string), "[SERVER]: {FFFFFF}You have been tied by %s(%d)!", GetName(playerid), playerid);
                SendClientMessage(otherid, 0xB0B0B0AA, string);
                format(string, sizeof(string), "[SERVER]: {FFFFFF}You have tie %s(%d)!", GetName(otherid), otherid);
                SendClientMessage(playerid, 0xB0B0B0AA, string);
                PlayerInfo[playerid][pRope]--;
                SetTimerEx("AntiTieAbuse",300000,0,"i",otherid);
        }
        return 1;
}

forward AntiTieAbuse(playerid);
public AntiTieAbuse(playerid)
{
        SetPlayerCuffed(playerid, false);
        format(string, sizeof(string), "[ANTI-ABUSE]: {FFFFFF}Player %s(%d) has been untied after 5 minutes tied!", GetName(playerid), playerid);
        SendClientMessageToAll(COLOR_YELLOW, string);
        KillTimer(AntiTieAbuse[playerid]);
}

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