bianca buono: right.t necessarily have enough yet to link dwight jones to these four murders. josh mankiewicz: but, there was still the dna. a detective who flew late sunday night to get dna samples from dwights family, now rushed those swabs back to the lab and-- rich slavin: within about four hours, we had a positive hit on mister jones. josh mankiewicz: we at dateline cover a lot of murders, some of which take years to solve. this case was not one of those. josh mankiewicz: less than eighty-four hours after this homicidal rampage began, investigators were confident they had idd their killer. rich slavin: we knew that he was our suspect and murderer. josh mankiewicz: at the same time the dna was being analyzed, detectives were retracing dwights steps via cell phone data. sometime before hed been placed under surveillance, dwight had contacted the residents of this home in fountain hills. a maricopa county sheriffs deputy to check on them. rich slavin: they used a ladder. they got to see through an upsta