Dennis Rader , the infamous “BTK” Killer , sees striking similarities between himself and Gilgo Beach murder suspect Rex Heuermann—once going so far as to call him a “clone of myself.” The 81-year-old Rader—who pleaded guilty to murdering 10 people in the Wichita, Kansas, area from 1974 to 1991, and is currently serving 10 life sentences in prison— wrote a letter to Fox News Digital in 2023 comparing the details of the case on New York’s Long Island to his own. “I was arrested age 59. Married, two kids,” Rader said in the letter. “Husband, dad longtime a serial killer, stalker, used electronic devices, lives in a neighborhood undetected.” Heuermann was arrested on July 13, 2023, and charged with six counts of murder in connection to the deaths of three women—Amber Lynn Costello (27 years old), Megan Waterman (22), and Melissa Barthelemy (24).…