Thirteen days after JonBenet Ramsey’s Christmas Day murder, her brother, Burke Ramsey, was brought in to speak with a child psychologist about what had happened.

He told the psychologist and police that his mother was “going psycho” looking for JonBenet and that “she was overreacting.” Burke seemed happy and carefree the whole time and joked about being too busy playing video games to worry about his sister.

Another disturbing thing that made the behavioral experts cast suspicion over Burke Ramsey’s involvement in his sister’s murder was his childhood scatological obsession. Crime scene evidence found feces smeared on a box of candy he gave JonBenet for Christmas.

The family housekeeper recalled Burke covering a bathroom wall with his excrement. During the murder investigation, she also recounted finding “fecal matter the size of a grapefruit” in JonBenet’s bed, which the housekeeper believed was left there by Burke.

According to a forensic pathologist Dr. Werner Spitz, who has worked on several high-profile cases, Burke showed signs of having a mental problem.

A former neighbor also said Burke had a temper and hit JonBenet in the face with a golf club about a year before her murder.

Although JonBenet’s parents were exonerated in 2008, and Burke was reportedly never considered a suspect, the grand jury wanted to indict both John and Patricia Ramsey on identical charges of “child abuse resulting in death and being accessories to a crime.” Prosecutors felt differently, though, saying that “there was insufficient evidence” to charge Ramseys.

JonBenét’s parents, in 1997, hold up an advertisement promising a reward for information leading to the arrest and conviction of their daughter’s killer.

True Crime Magazine’s Behind the Tape Photobook features 20 exclusive GRAPHIC photos taken on the day of the shocking discovery, as well as nearly a thousand more crime scene photos.