For all the computing power at disposal, the games curiously relies on the *players* to determine the final outcome. Once you feel you know who the killer is and have enough evidence, the computer will tell you to look up the solution in the solution book that comes with the game (downloadable below as "Solution"). The computer will then spits out a rough rating of your sleuthing skills based on the time you take to solve the case. In a multiplayer game, trust is not a problem, because the first player who thinks he/she solves the case can announce his/her reasoning to the group, which can be cross-checked with the official solution. If you're playing by yourself, though, this paper-and-machine combination is not effective-- you can "cheat" by just announcing to the computer that yes, you did solve the case, in order to obtain the rating. But of course, no self-righteous sleuth will ever do that ;)
In the end, despite dubious implementation scheme of mixing paper and computer, both entries in the short-lived "Mystery Master" series succeed in delivering 12 very well-written, intriguing murder cases that cover a wide range of subjects and motives. Strong deductive skills are required to isolate red herrings from clues, and then from minor clues to real evidence that will put the killer behind bars. Highly recommended, especially if you can find friends to play against and to keep your cheating tendencies in check :) Thumbs up for both!