Most popular candidates for Dark Matter are protected from
decaying by some kind of symmetry. As massive particles they could
otherwise decay into lighter SM particles. We suggest a scenario where
there is no such protection and where the Dark Matter candidate decays.
However, it is very long-lived due to its weak coupling, with a lifetime
larger than the age of the universe. Such a scenario is realized by
gravitino Dark Matter in R-parity violating models. We discuss
observables of such a scenario, both in astrophysics experiments and at
the LHC.
