The team sends them away saying that the prints didn't match any of theirs. Later they make maitri call the culprit threatening him that she had come to know about his plans and would reveal that to CID unless he did what she said. This makes him come to kill her but the CID team is there to protect her. The murderer reveals his intention and the case ends
(Not revealing the culprit here. I may have missed some points here and made the case look little dull by my description but it was really interesting)