Using Hamiltonian analysis, we demonstrate that the only local degrees of freedom are two massive spin-2 modes. 
Hamiltonian analysis
Unitary Extension of Exotic Massive 3D Gravity from Bigravity.We obtain a new 3D gravity model from two copies of parity-odd Einstein-Cartan theories. 
Einstein-Cartan theories
Unitary Extension of Exotic Massive 3D Gravity from Bigravity.We obtain a new 3D gravity model from two copies of parity-odd Einstein-Cartan theories. 
parity-odd Einstein-Cartan theories