Britain’smostnotoriousserialkiller,DennisNilsen,confessedtokilling15peoplein1983.Overafive-yearperiod,hepickedupvulnerableyoungmen,luredthembacktohishomeandstrangle…

　Britain’s most notorious serial killer, Dennis Nilsen, confessed to killing 15 people in 1983. Over a five-year period, he picked up vulnerable young men, lured th…