There was one about 45 miles from where I grew up, back during the 80s (even though the guy eventually got off on a retrial). Man was a traveling saleman, had a wife and three children. He's out of the state and calls police asking them to check on the family, they do and find that the wife and three children have been hacked to death with an axe.
His alibi was that he wasn't there because he was out of state. Still, it was kind of a hole-filled alibi and then there was one little tidbit that is what really gave me the chills. (I got this info from someone I knew who was on the scene). The victims had all been tucked into bed under electric blankets (supposition being that it was to try to disguise the time of death, that he'd really done it, then left for his business trip, while trying to make it look like they hadn't been dead quite so long (keeping the body temps up).
I'm not really sure why his original conviction was overturned, but it was, and he got off on the re-trial and then moved to yet another state.