Warning: This story contains offensive language, discretion is advised As the former head of homicide for Toronto police, Hank Idsinga was instrumental in solving some of the city’s most notorious crimes. His new memoir, ‘The High Road: Confessions Of A Homicide Cop’ delves into many of those gripping tales. But the seasoned cop didn’t just stare down stone cold killers. Idsinga, whose grandfather was murdered in the Holocaust, also claims he st…