plus, the letter from president biden s doctor after a raspy- voice press conference. deadly stabbing spree: a columbia university grad student is killed. what s behind the troubling nationwide spike in homicides? alec baldwin speaks out, the emotional interview. why the actor says he s not to blame for that deadly movie set shooting. honda safety warning: 700,000 s.u.v.s and pickup trucks recalled. we ll tell you which models are impacted. and on the road with a story of a vermont town that rallied to save its 130-year-old general store. this is the cbs evening news with norah o donnell, reporting from the nation s capital. brennan: good evening to our viewers in the west, and thank you for joining us. i m margaret brennan in for norah. as we come on the air tonight, an intense search is underway for two parents now facing criminal charges connected to that deadly school shooting this week in oxford, michigan. their 15-year-old son is accused of using a pistol purcha