For those interested in cutting edge, violent criminal interrogations, the famous case of Colonel Russell Williams, an extremely high ranking member of the Canadian Air Forces is worth a look. Williams commanded CFB Trenton, Canada's largest military airbase and a hub for the country's foreign and domestic air transport operations. He was also a decorated military pilot who had flown Canadian Forces VIP aircraft for dignitaries such as Queen Elizabeth II, Prince Philip, and the Governor General and Prime Minister of Canada.
He was formally charged with two counts of first-degree murder, two counts of forcible confinement, two counts of breaking and entering, and sexual assault Another 82 charges relating to breaking and entering. On October 21, 2010, Williams was sentenced to two life sentences for first-degree murder, two 10-year sentences for other sexual assaults, two 10-year sentences for forcible confinement, and 82 one-year sentences for breaking and entering, all to be served concurrently.
He was married to the executive director of a major charity organization in Ottawa, Canada. He would break into women's homes, wait for them, dress in their underwear, photograph himself and kill. They ransacked his house and found tons of electronic evidence of photos neatly stored.
Long story short, he was an exceptionally tough nut to crack. On February 7, 2010, Williams was interrogated at Ottawa Police Service headquarters by OPP Detective Staff Sergeant Jim Smyth. The interview started at 3 p.m. and by 7:45 p.m. where he confessed his crimes. The interrogation lasted approximately ten hours.
The detective did such an exceptional job in the interrogation - smooth-talking his way into the inner reaches of Williams' psyche using incredible psychology but in a very, very slow, calm, and friendly manner out smarting Williams by gaining his trust. The video I have posted is now mandatory viewing for detectives, psychologists, criminologists doing coursework studies in several universities across Canada and the U.S. - I believe.