The skeletal remains are the best evidence, whether or not Keitada Yukio is the "Tuesday Night Killer," at the very least the right person was apprehended, and he has to give an account for this set of bones.
Nakano Eri was greatly invigorated and immediately ordered a comprehensive background check and emergency interrogation of Keitada Yukio. At the same time, she called in the forensic department and more detectives to prepare to dig up the entire front and back yard of the Keitada household. Every room had to be searched inch by inch, repeatedly, and even rat holes had to be checked by three people taking turns to grope inside. No clue could be overlooked.
She had a premonition that Nanahara Takeshi, this young man, was still reliable and probably hadn't got the wrong person.