Him: What Would I Do If I Were a Murderer?

(No harem, no invincibility, no system, no brainless, non-combatants please evacuate) I was originally one of the top 100 detectives in the UK, but my record of zero mistakes was broken by a person named "T". The person's methods were extremely cruel. It was deduced that he might be a secret criminal organization. Now the police have been dealing with "T" for several months and asked me to intervene. Everyone, please cooperate with me to uncover "T" and bring him to justice.