In his first ever television interview, killer Thomas Gilbert, Jr. discusses the murder that shook New York's elite. The Princeton-educated Gilbert became a tabloid obsession when he shot his father after his $1,000 allowance was cut off. But in this unique installment of Interview With a Killer, Gilbert appears to be a far cry from his once golden upbringing. Host David Scott explores his long history of mental illness and the privileged pressure cooker that shaped his downfall.