The Lorelei Murder

After spending seventeen months on Space Station Pluto, Ensign Shawn Michael MacTavish returned home to discover his wife, Lorelei Lunar, had been murdered. The guilty person was none other than Basil T. Huntington, who was a power unto himself. The people of one of his twelve planets stated he was on their world when Shawn Michael's wife was being murdered. Facing an airtight alibi like that, how can MacTavish prove Huntington is guilty? Also, how can MacTavish stay alive when someone keeps trying to kill him? His problem is twofold, how to solve his wife's murder and how to keep from being murdered.