Leroy Kettler was a criminal known as the Black Arrow. He sent notes to his victims before murdering them.
He killed 2 people in Arizona which were found the summer of 2041, but the local police kept them off the wires. 3 other victims were found the following March and 2 more in Nevada before the police caught up with him.
The FBI moved in and media coverage stopped. Some inmates saw him visited by two men in suits. That same night he was found dead in his cell hanged by shoelaces, although he didn't have any.
As Lucia Pernell learned, he signed a confession before his "suicide", but later the confession was lost.