Israeli Witness Voices Doubt On Demjanjuk Nazi ID Card  AP,
Special to the New York Times Published: October 27, 1987  A
defense expert raised questions today about a Nazi identity card
crucial to the war crimes case against John Demjanjuk,
testifying that the Russians often forged World War II
documents.  The trial of the retired Ohio autoworker resumed
after a two-month recess.  Defense lawyers called the expert,
Avraham Shifrin, in hopes of proving that the K.G.B. had forged
an identity card that the prosecution contends shows Mr.
Demjanjuk worked for the Nazi SS.  Mr. Demjanjuk, 67 years old,
is accused of being the Ukrainian guard known as ''Ivan the
Terrible'' who operated the gas chambers at the Treblinka death
camp in Nazi-occupied Poland, where 850,000 Jews died.  Mr.
Shifrin, an Israeli who runs a center in Jerusalem on activities
of the Soviet security and intelligence service, said that soon
after the war, ''the K.G.B. consulted me in order to fabricate
dossiers on people who had fled the Soviet U