Legacy of Terror episode-laughable 'green beret'

Sometimes Hollywood shows its amazing laziness in researching U.S. military uniforms, ranks, equipment, and anachronisms.

In the episode, "Legacy of Terror", one of the murder victims is a veteran combat Green Beret, who was assigned to an Army recruiting station in Chicago.

I think a lot of military vets would laugh at the actor's costume although it's not the actor's fault.

1) The actor's hair was far too long. The U.S. Army would have never tolerated
that long hair. It would have been cut close and short around the head. The
first giveaway that Hollywood doesn't know about military is that an actor
has too much hair in the back of the head.

2) Kolchak referred to him as a staff sergeant. The actor's Army uniform
costume had the enlisted rank insignia of, 'Specialist Seven', which is
pay grade level, E-7, and better known as, Sergeant First Class. At the
time of this tv show, the Army did have a Specialist Seven enlisted rank
but in 1985 abolished all the specialist ranks except for Specialist Four
which still exists today.

3) Real-life Army Green Berets learn extensive hand-to-hand combat so it
seems odd that the tv green beret was so easily overcome even by surprise.
A combat experienced green beret should have reacted far more effectively
with all-out hand-to-hand lethal self-defense. More, while civilians tend
to learn just defensive hand-to-hand martial arts, green berets learn
aggressive, hand-to-hand fighting skills which emphasize quick disabling and
even killing of the opponent.

Later in the episode it gets worse when Vicenzo and Carl are introduced to
several military persons, one being an Air Force major. The actor's hair is
obviously too long too. But that was Hollywood in 1974 and I doubt many actors were willing to take a military buzz haircut for a tv episode.