subculture that many florentines found disturbing. these hills were not only being stalked by a killer, they were also swarming with peeping toms. police quickly zeroed in on one of these voyeurs. >> they focused on a fellow who was an ambulance driver during the day and who had been creeping around those hills at night and they arrested him. he lied to them at first. of course, he lied. he didn't want to admit what he was doing, and then even when he did admit he was a voyeur he lied about his movements that night and was contradicted by other people. so they thought, we've got our man, here he is. they arrested him. >> but then in october of 1981, with the suspect in jail, the monster struck. once again, the victims were young lovers in their 20s, shot to death on a lovers lane in the countryside, murders five and six. the same beretta .22 was the murder weapon. the young woman suffered the same postmortem mutilation, performed with a notched knife. this murder set up a pattern that would repeat itself.