public void TradeClue(Clue c, Investigator previousOwner)
    {
        Investigator i1 = App.Model.tradeModel.investigator1;
        Investigator i2 = App.Model.tradeModel.investigator2;

        if (previousOwner.investigatorName == i1.investigatorName)
        {
            i1.TradeClue(c, false);
            i2.TradeClue(c, true);
        }
        else
        {
            i2.TradeClue(c, false);
            i1.TradeClue(c, true);
        }
        App.View.tradeView.TradeMade();
    }