Gerald Seymour-The Heart of Danger

A mass grave is uncovered in a devastated Croatian village, and the
mutilated body of a young Englishwoman, Dorrie Mowat, is exhumed.
Her mother, who detested Dorrie when she was alive, is determined to
find out how her daughter died. But with civil war tearing apart the
former Yugoslavia, none of the authorities are interested in what they
view as a minor war crime. She employs private investigator, Bill Penn,
a former MI5 officer, who anticipated a short trip to Zagreb where he
will compile a meaningless report and receive a good fee at the end
of it. But once he has seen the killing ground, Penn becomes determined
to find the truth behind the young woman's death.