Jar city : a Reykjavik thriller / Arnaldur Indriðason ; translated from the Icelandic by Bernard Scudder.

Enhanced descriptions from Syndetics:

Jar City introduces American readers to a new crime writer from Iceland whose work has created an international sensation. Arnaldur Indridason has been compared to such luminaries in the field as Henning Mankell, Georges Simenon, Per Wahloo and Maj Sjowall; everyone agrees that here is a world-class writer.
When a lonely old man is found murdered in his Reykjavík flat, the only clues are a cryptic note left by the killer and a photograph of a young girl's grave. Inspector Erlendur, who heads the investigation team, discovers that many years ago the victim was accused, though not convicted, of an unsolved crime. Did the old man's past come back to haunt him?

As the team of detectives reopen this very cold case, Inspector Erlendur uncovers secrets that are much larger than the murder of one old man--secrets that have been carefully guarded by many people for many years. As he follows a fascinating trail of unusual forensic evidence, Erlendur also confronts stubborn personal conflicts that reveal his own depth and complexity of character. Like all great crime fiction, Jar City is about much more than murder, and avid suspense fans are about to discover a first-rate writer who has already received rave reviews around the world.