Erratic eye movement

The attacker or his accomplice, concerned about being
caught mid-act, will constantly be checking for
police/general public involvement. Whilst he is speaking to
you his eyes will be darting in other directions. Therefore it
is a bad sign if he keeps looking past and around you as he
speaks.
Adrenal reaction
Unless the attacker is seasoned he will be showing signs of
adrenaline. His face will appear pale his eyes wide from
adrenaline-induced tunnel vision, he will be stern and
unsmiling. He may also fidget in an attempt to hide 'adrenal
shake' (the body will' shiver' as though cold) and his voice
may have a nervous quiver.