Ruben Fausto was a HYDRA sleeper agent within S.H.I.E.L.D. who was killed by Deathtail during her operation against S.H.I.E.L.D.
Ruben Fausto was a HYDRA sleeper agent within S.H.I.E.L.D. who was killed by Deathtail during her operation against S.H.I.E.L.D.