FRONTLINE: "RAISING ADAM LANZA"
PBS, 10:00 p.m. ET
Another “instant” Frontline special, this one reported in collaboration with the Hartford Courant, looks at serial killer Adam Lanza’s first and most familiar victim on the day of his rampage at Sandy Hook Elementary School – his mother, whom he killed, in gruesome fashion, before setting out to claim more victims. What was her relationship with her son? Why did she pass on her enthusiasm for guns? And what, if anything, can be learned from looking at someone who commits such a ruthless series of acts? Check local listings.