delay in the new york grand jury probe into donald trump. also, mr. trump s feud with potential 2024 rival ron desantis is heating up. the colorado dentist accused of fatally poisoning his wife, formally charged with murder in court. midair scare. the captain on a southwest flight suffering a medical emergency, and the off-duty pilot who stepped in to help land the plane. our nbc news exclusive. on patrol with nato, guarding against the rising threat of russia at sea. and kids helping kids. the heartwarming idea inspired by our edition of nightly news just for children. announcer: this is nbc nightly news with lester holt. good evening and welcome on this thursday. is the clock ticking down for tiktok in america? the head of the wildly popular but also heavily criticized social media platform came to capitol hill today and walked right into a bipartisan storm of suspicion and distrust about the app. its chinese owners and its potential national security risks
proteiin shake with poison. dentistry can be expensive. dentistry can be scary. reporter: calling their case against the doctor heinous and complex, investigators allege the father of six, whose children were in court today, was no loving husband to wife angela. in this 52-page affidavit, police say he searched top five undetectable poisons that show no signs of foul play, and is arsenic detectable in autopsy. according to the same documents, craig ordered both arsenic and potassium cyanide online. police say the doctor n lacehis wis roteinhake, which led to her death saturday. the next day he was arresteted. the v victim ss sisterer told police james had drugged his wife before. detectives believe the dentist wanted to start a new life with his lover, who flew to colorado as angela craig was dying. whenever a defendant is accused of killing his or her spouse, evidence of an extramarital affair will always be