  Massive gravity in three dimensions accepts several different formulations.
Recently, the 3-dimensional bigravity dRGT model in first order form,
Zwei-Dreibein gravity, was considered by Bergshoeff {\it et al.} and it was
argued that the Boulware-Deser mode is killed by extra constraints. We revisit
this assertion and conclude that there are sectors on the space of initial
conditions, or subsets of the most general such model, where this mode is
absent. But, generically, the theory does carry 3 degrees of freedom and thus
the Boulware-Deser mode is still active. Our results also sheds light on the
equivalence between metric and vierbein formulations of dRGT model.
