_Chi L'ha Vista Morire?_ is, visually, a very beautiful film. From the first shots emphasising the starkness of the alpine landscape which segue into similarly stark black and white photos and drawings from a police file to the closing scenes, the cinematography is beautiful. In particular, one shot in which a flock of pigeons taking flight in a town square provides a metaphor for the rising panic of the father, played by George Lazenby, struck me as particularly beautiful - both aesthetically pleasing in its own right and a very tasteful way to lay the ground for the scene that follows. A unifying visual motif is the veil worn by the killer, which makes for some interesting point-of-view shots, although the impact must have been blunted somewhat by viewing on video.
Unfortunately, there's some flaws that detracted from the experience for me. Lazenby does not speak Italian, so his lines are dubbed. At times, the sound level appears to be much too high, making the dubbing glaring. Similarly, the soundtrack is at times overbearing, particularly during appearances by the killer, whose discordant "theme music" became incredibly annoying, particularly when the rest of the film was marked by such a light touch. Mercifully, this problem is rectified at the climax and the music is cut short.
On the visual side, watch for some very fake looking blood. Many scenes (particularly interior scenes) are very dark, which caused me some problems in determining what was going on, but again this may have been compounding by watching on videotape rather than the big screen.
Overall, a satisfying mystery film, if a little slow-paced.