  BiTeI has a layered and non-centrosymmetric structure where strong spin-orbit
interaction leads to a giant spin splitting in the bulk bands. Here we present
high-resolution angle-resolved photoemission (ARPES) data in the UV and soft
x-ray regime that clearly disentangle the surface from the bulk electronic
structure. Spin-resolved UV-ARPES measurements on opposite, non-equivalent
surfaces show identical spin structures, thus clarifying the surface state
character. Soft x-ray ARPES data clearly reveal the spindle-torus shape of the
bulk Fermi surface, induced by the spin-orbit interaction.
