Nothing was typical about the night of Oct. 30, 1975, in Belle Haven, one of Connecticut’s most exclusive enclaves, except for the pre-Halloween mischief some local teenagers were engaging in.

Then, the next morning, the body of 15-year-old Martha Moxley was discovered in the backyard of her parents’ home in the gated Greenwich neighborhood. Moxley had been ferociously beaten to death with a six-iron golf club, police say.