he was a intelligent human being, fairly well spoken. i do not think there is any doubt about his sanity, this is just a violent human being. welcome to "very scary people." i'm donnie wahlberg. some crime experts call the 1980s the decade of the serial killer. according to at le >>ast one stud> welcome to very people. some crime experts called the 80s the decade of the serial killer, one study showed there were about 200 of these on the loose. one man stood out, his of the dems ranged from toddlers to the elderly.