[Konstantinos]

First of all, change to:

pawn Код:

if( sscanf ( params, "uds[48]", iPlayer, iLevel, iReason))

Size is needed to "s" specifier.

You can store the reason. For example:

pawn Код:

// Global variable
new
    Wanted_Reason[ MAX_PLAYERS ][ 48 ]
;

// OnPlayerConnect:
Wanted_Reason[ playerid ][ 0 ] = EOS;

// When you set the wanted to 0, reset the reason like in OnPlayerConnect.

COMMAND:makewanted(playerid, params[])
{
    if(!IsPlayerFED(playerid) && GetAdminLevel(playerid) < 6) return SendClientError(playerid, CANT_USE_CMD);
    new iPlayer, iLevel, iReason[ 48 ];
    if( sscanf ( params, "uds[48]", iPlayer, iLevel, iReason))  return SCP(playerid, "[PlayerID/PartOfName] [level] [reason]");
    if(iLevel < 1 || iLevel > 6) return SendClientError(playerid, "Invalid level. Valid: 1-6");
    format(iStr, sizeof(iStr), " HQ: All units APB on %s,", RPName(iPlayer));
    SendClientMessageToTeam( PlayerInfo[playerid][playerteam], iStr, COLOR_PLAYER_SPECIALBLUE);
    format(iStr, sizeof(iStr), " HQ: Wanted for %s, category %d wanted suspect.", iReason, iLevel);
    SendClientMessageToTeam( PlayerInfo[playerid][playerteam], iStr, COLOR_PLAYER_SPECIALBLUE);
    SetPlayerWantedLevel(iPlayer, iLevel);
    strcpy( Wanted_Reason[ playerid ], iReason, 48 );
    return 1;
}

COMMAND:wantedlist(playerid, params[])
{
    if(!IsPlayerFED(playerid) && !GetAdminLevel(playerid)) return SendClientError(playerid, CANT_USE_CMD);
    PlayerLoop(i)
    {
        SendClientMessage(playerid, COLOR_RED,"===============[WANTED LIST]===============");
        format(iStr,sizeof(iStr),"%s %d stars, Wanted for: %s",RPName(i),GetPlayerWantedLevel(i), Wanted_Reason[ i ]);
        if(GetPlayerWantedLevel(i)>=5) SendClientMessage(playerid,COLOR_RED,iStr);
        if(GetPlayerWantedLevel(i)<5 && GetPlayerWantedLevel(i)>=2) SendClientMessage(playerid,COLOR_ORANGE,iStr);
        if(GetPlayerWantedLevel(i)<2 && GetPlayerWantedLevel(i)>0) SendClientMessage(playerid,COLOR_PLAYER_DARKYELLOW,iStr);
        SendClientMessage(playerid, COLOR_RED,"===========================================");
    }
    return 1;
}

pawn Код:

stock strcpy(dest[], const source[], maxlength=sizeof dest)
{
    strcat((dest[0] = EOS, dest), source, maxlength);
}