The two Texas brothers accused of slaughtering four family members before killing themselves said they easily got weapons because gun control is “a joke” — and were sent off the rails partly from watching TV’s “The Office.” In a rambling 12-page note initially linked to his Instagram page, Farhan Towhid, 19, said that he and his 21-year-old brother, Tanvir Towhid, were united in manic depression and all-day TV watching sessions. “The first and most important show we watched was ‘The Office’,” Farhan wrote in the note that started, “Hey everyone, I killed myself and my family.” The Steve Carrell comedy...