In the year 2006, "In Cold Blood"-a riveting thriller from 1967-has two new interesting contexts that it did not previous have. First, and most chillingly, is the fact that it's star, Robert Blake, was recently on trial for murdering his wife. Second, the recent Oscar winning biopic, "Capote" showed the muddled back story of this haunting true crime tale's author, Truman Capote. These two new twists make the film timely for a modern audience.
As a stand alone film from it's era, "In Cold Blood" is top notch in every way. Most notable is the stunning black and white cinematography from Conrad Hall (later of "American Beauty" and "Road to Perdition" fame). Many of the stills from this film of the Kansas farm house at night or the tree-lined back country roads could be sold as fine art photography. Combined with the cracker-jack direction from Brooks and superb editing in the early scenes (where we see the mundane daily life of the innocent family about to be senselessly slaughtered beautifully intertwined with the plotting of the two hapless killers), a rich brooding atmosphere is created that sets the stage for riveting suspense (even when everyone knows how this is all going to end due to the fact its all based on real life events). It's also great to see in this day and age how brilliantly staged a harrowing murder scene can be depicted where the graphic nature of the act is transmitted to the viewer subliminally with nary a drop of blood shown on screen.
The film is also anchored nicely by Robert Blake's eerie performance as the more sympathetic yet senselessly brutal side of the killing duo. The flashback scenes to his horrible childhood are extremely well done. Then there is the scene towards the end of the film where he is speaking to the reverend before being sent to the gallows and he makes his last "confession" so to speak. It's one of those classic movie moments that is a perfect marriage of gritty acting, superb writing, flawless direction, and haunting photography. I dare you to erase from your mind the stark image of the rain's reflection from the window flowing down Robert Blake's pallid face in lieu of actual tears.
The only thing hampering "In Cold Blood" is the slow moving middle act where the killers are on the lam and the forced nature of the social commentary at the end. The tacked-on political message about the death penalty is secondary to its compelling depiction of the mad killers and their prey.

Felt mine was while watching this...but it seems that is the reason for insanity running in the family in this film. Not that makes a lot of sense anyway, as others have mentioned, this was one of Karloff's last films and it's only his screen presence that lends it any credibility at all. It's sad that all of the great legends of the horror films in the sound era were eventually reduced to starring in low grade rubbish like this. Marginally, Boris did get off slightly better than poor old Bela Lugosi but not by much.
Boris does his best and give him credit for trying to hold this mess together. The strident background music doesn't help and distracts from any lucid moment. Apart from Boris, the rest of the Mexican cast are dubbed into some strange, clipped, English monotone that is reminiscent of the type used in porn films of the late seventies.
At a guess I think it's Edgar Allen Poe's 'House of Usher' that this is taken from but you'd be hard pressed to find a great deal of Poe in the finished article.
Still, there are far better films out there with Boris Karloff at his best, search them out and give this a wide berth, unless you want the curse of the 'shrinking brain' too!