. >> reporter: victoria newmont gomry and gave the police his name. the police typed a report and never followed up. and victoria walked herself to the hospital. her rape kit too, modeled for five years, and montgomery was still on the loose. eventually 10,000 rape kits were discovered in the old detroit police crime lab to great national shame. kits were tested and the dna matched vantoya's murder case. they circled back to victoria last year. >> what made you want to help police five years later. >> because he's doing it to girls who don't deserve it. no woman deserves to be raped at all. >> unbelievably, authorities already had montgomery's name and dna sample from yet another abduction case in 2015. inexplicable, that dna sample sat around in the michigan state police crime lab, untested for 250 days. the dna backlog there stands at about 4,000 case. detectives and prosecutors in came back to montgomery. but before the authorities could apprehend him, montgomery struck once more in october of last year, nearly killing an emt. >> but the reality is,