A few multiplets that can be added to the SM contain a lightest
neutral component which is automatically stable and provides allowed
DM candidates with a non-standard phenomenology. Thanks to
coannihilations, a successful thermal abundance is obtained for well
defined DM masses. The best candidate seems to be a SU(2)L fermion
quintuplet with mass 4.5 TeV, accompanied by a charged partner 166
MeV heavier with life-time 1.8 cm, that manifests at colliders as
charged tracks disappearing in p± with 97.7% branching ratio. The
cross section for usual NC direct DM detection is sSI = f2 1.0
10-43 cm2 where f ~ 1 is a nucleon matrix element. We study
prospects for CC direct detection and for indirect detection.