Henry Grace

Henry Grace is a narcissistic serial killer and the main antagonist of Criminal Minds episode Masterpiece in season four.

Background
Grace was the brother of a serial killer named William Grace who was caught by Rossi and executed for his crimes. And thanks to that he lost everything. So in revenge, Grace killed in the years 2000 to 2008, he also took pictures of the victims. With that, Grace disguised herself with a fake named Paul Rothschild and when he saw some BAU members, Grace soon revealed herself as a serial killer and threw the photos of her victims to the ground before being taken by BAU at the police station. Arriving in the interrogation room, he only accepts talking to Rossi or Reid, and when Norman reads his rights and Grace ignores him while talking to Rossi, Norman hits the table telling him if he understood his rights, but Grace denies them and criticizes him for knocking the table, and Norman repudiates the cruel acts committed by Grace.

Masterpiece
After putting Grace in custody, he says he has five women he has kidnapped who could die. The team then goes to a place that is actually a trap. Grace also states that they will not go out alive at home and that she knows Rossi will send them to find the missing people. While both Rossi and Grace exchange teasing. Grace claims that he has an extra Y-chromosome and that because of this he was born to be a killer, Rossi refutes this by saying that he has decided to be a killer. After a while Grace reveals that this was all for revenge for losing everything after her brother was arrested.