Inspector Wexford - Put On By Cunning

From the VHS cover:
"Celebrated international flautist, Sir Manuel Camargue, is found drowned in an icy lake in the grounds of his home. Everyone believes his death is a tragic accident, but Wexford becomes suspicious when Camargue's fiancee Dinah claims that his long-lost daughter, Natalie, who returned to see her father shortly before his death, was an impostor.
In trying to prove the deception, Wexford's trail leads him to America where Natalie had spent the years away from her father. ...."