  We revisit the scenario of a massive spin-2 particle as the mediator for
communicating between dark matter of arbitrary spin and the Standard Model.
Taking the general couplings of the spin-2 particle in the effective theory, we
discuss the thermal production mechanisms for dark matter with various channels
and the dark matter self-scattering. For WIMP and light dark matter cases, we
impose the relic density condition and various experimental constraints from
direct and indirect detections, precision measurements as well as collider
experiments. We show that it is important to include the annihilation of dark
matter into a pair of spin-2 particles in both allowed and forbidden regimes,
thus opening up the consistent parameter space for dark matter. The benchmark
models of the spin-2 mediator are presented in the context of the warped extra
dimension and compared to the simplified models.
