It is a riveting, dreamlike evocation of this man’s tortured, unhappy life, whose transient successes bring him no pleasure of any kind.

The requiem-like heaviness of the music at times risks pushing Ted K into overwrought territory, but this remains a haunting vision of vengeful obsession carried out by a criminal who makes some provocative points.

Director and co-writer Tony Stone built his script out of Kaczynski’s endless writings, his letters to the editor, his phone calls with his increasingly estranged and eventually alarmed family, and out of his infamous newspaper-published “manifesto.” And Copley brings the articulate, twisted and deranged writings to life.

A risky experiment with a striking payoff, Ted K is an impressionistic attempt to personalize the most unrelatable experience imaginable: life as a killer.

A little of Ted Kaczynski can go a long way — especially at two hours — even as one’s appreciation for Copley’s intensity and cinematographer Nathan Corbin’s artful shotmaking never wanes. But in the well-trod realm of forensic examinations of the notorious, Stone’s considered hike into the life and times of a very American-made extremist does have undeniable power.