Premise: Gary Ridgway . He was initially convicted of 48 separate murders and later confessed to nearly twice that number . As part of his plea bargain , an additional conviction was added , bringing the total number of convictions to 49 , making him the most prolific American serial killer in history according to confirmed murders . Most of his victims were alleged to be sex workers and other women in vulnerable situations , including underage runaways . On November 30 , 2001 , as he was leaving the Kenworth truck factory where he worked in Renton , Washington , he was arrested for the murders of four women whose cases were linked to him through DNA evidence .
Hypothesis: Gary Ridgway killed people.
Label: ENTAILMENT