I Said, I'm Not a Murderer

The Protagonist Designed the Crime, No One Survived, Manslaughter

There is a novel in which the protagonist travels to a time to reduce the crime rate, so he organizes a live broadcast of solving crimes. The protagonist wrote the script of Manslaughter, Mekong River Case, No Survivor, and participated in it. After the completion, there will be an explanation from the police station. What novel is it? I forgot.

Looking for a Perfect Crime with High IQ. Cold-Blooded and Ruthless Criticizing, Rational Lunatic Pretending to Be

High IQ Crime, No Heroine, Lawless Maniac

I want to see a story about a male protagonist with a high IQ who commits crimes, can hypnotize people over the phone, and doesn't have a female protagonist.