ThreeFingered Detective

Being acquainted with the brides uncle a famed private detective is invited to a wedding ceremony The grooms family is moneyed and owns large tracts of land The bride is a former teacher and was rumoured to have had an affair which explains why the grooms family opposed the union On the night of the ceremony the bride and groom are killed in a sealed room There is evidence left however as there is a hand print on the wall albeit with only the trace of three fingers