and thanks so much for joining us, i'm jessica layton. the second act of the trump administration is officially under way, after an action-packed day one. the newly-inaugurated president donald trump spent the evening celebrating with supporters. he and the first lady shared dances at three inaugural balls throughout the capital. >> we needed three, because we have such support. there's a longing for competence in this country. there's a longing for common sense. >> soon after taking the oath, president trump quickly got to work to implement his agenda, signing a flurry of executive orders and presidential pardons. the president kept one of his controversial campaign promises, issuing nearly 1500 pardons to his supporters who were connected to the january 6th attack on the capitol. including those who assaulted law enforcement officers. the sentences of 14 others were commuted. 44-year-old gabriel garcia celebrated his pardon by cutting off that ankle monitor. garcia was a member of the proud boys, who had been convicted of three felony o

i'm jessica layton. in act two of the donald trump white house, today will be the first full day of business. but rst, celebrations with supporters. the newly-sworn-in president and first lady were the guest of honor at three inaugural balls last night, starting with the commander in chief ball geared toward military service members. >> i've had no higher privilege in life than to serve as your commander in chief not once but twice. [cheers and applause] >> well, the dancing and fanfare capped off a very busy first day in office. president trump has already taken a flurry of executive actions. nbc's susan mcginnis kicks off our coverage. >> reporter: first dance at the first inaugural ball for president trump and the first lady, even though it's their second time around. it's one of three balls capping a day filled with ceremonies, celebrations, even an indoor parade. ♪ ♪ but amid the festivities and galas, it was down to business. president trump signing a flurry of executive orders, trying to fulfill h

>> i'm jessica. laytonand. >> army combat. >> veteran pete. hegseth has been. >> sworn in as secretary of defense. >> after vice president jd vance cast the tie breaking vote in the senate. it's the second time in u.s. history a vp has done so for a. >> cabinet. >> nominee, and for female. >> israeli soldiers. >> have been released in exchange for 200. >> palestinian prisoners. >> this is the second group to. >> be released by hamas into israeli. territory as part of a very fragile ceasefire agreement. >> and now. >> and now. >> back to dateline. [melancholy music] josh mankiewicz (voiceover): investigators in fort worth, texas, had found 17-year-old carla walker's body in a lonely culvert. she'd been raped, strangled, and badly bruised. it wasn't clear in what order. now, they had to tell her family. jim walker: sheriff's department came by, and mom and dad had to go down and identify carla's body. josh mankiewicz (voiceover): a neighbor drove them to the morgue. young jim waited in the car. jim walker: mo

. >> i'm jessica layton with the hour's top stories.uguration of donald trump. the events will be held inside due to poor weather in washington. mr. trump is then expected to begin his second term by signing more than 50 executive orders, including one delaying the ban on tiktok. here in the u.s, the chinese owned video app came back online sunday after temporarily going offline. the company said it looks forward to working with mr. trump on a long term mr. trump on a long term solution. now back to dateline. keith morrison: at the end of the highway to galveston, texas is a road sign. "mile 0," it says. this is where bob durst went to vanish. he had actually moved here just weeks before susan berman's murder. and initially, he was not a suspect, but he took pains to keep himself hidden. as he told his friends, the altman's-- stewart altman: nobody would be looking for a robert durst in a $300 a month apartment under an assumed name. keith morrison: the name of an old high school classmate, named dorothy ciner. although, in his log, he

. >> i'm jessica. >> layton with the hour's. >> top stories.and army combat veteran pete hegseth has been sworn in as secretary of defense after vice president jd vance cast the tie breaking vote to confirm him in the senate. >> it is only the second time. >> in u.s. history that a vp has done so for a cabinet nominee, and four israeli soldiers have been released in exchange for 200 palestinian prisoners. this is the second group to be released. by hamas into israeli territory. >> as part of a fragile. >> cease fire agreement. and now >> cease fire agreement. and now let's go back welcome back to "dateline." i'm andrea canning. where was mackenzie lueck? the college student took a lyft to meet someone in a park at 3:00 am. but who? mackenzie was active on dating sites, making police wonder if her late night rendezvous was a hookup, and her radio silence was intentional. now a tipster was about to share troubling details of his encounter with mackenzie shortly before she went missing. here's keith morrison with "the waiting car." keith morrison

. >> i'm jessica. >> layton with the hour's. >> top story.ews anchor and army combat veteran pete hegseth has been sworn in as secretary of defense after vice president jd vance cast. >> the. >> tie breaking vote to confirm him in the senate. >> it is the. >> second time in u.s. history that a vp has done so for a cabinet nominee. and for female. >> israeli soldiers have. >> been released in exchange for 200 palestinian prisoners. it is the second group to be released. by hamas into israeli territory. >> as part. of a very fragile. >> ceasefire agreement. and now >> ceasefire agreement. and now back to dateline. welcome back to "dateline." i'm andrea canning. chacey poynter told investigators that her husband robert had just pulled her jeep from the mud when he was shot dead. by who, she couldn't or wouldn't say. now chacey was headed to an interrogation room where a keen-eyed detective was determined to get to the truth. back to josh mankiewicz with "out of the darkness." josh mankiewicz: royse city detective michael burk might have been wor

. >> i'm jessica layton with the hour's top stories. >> a west. >> palm beach man was arrested. >> accusedl. >> president donald trump. >> authorities say the man. >> posted the threats on facebook. >> police say he. >> was arrested. >> near his home and. >> had three bags. >> of cocaine on him. and kia. has recalled more than 80,000 of its niro vehicles due to airbag and seat belt issues. >> that's according to the national highway traffic. >> safety administration. kia owners will be notified by march if they need their vehicles if they need their vehicles inspected. and now let's go back welcome back to dateline. i'm andrea canning. john hinckley jr. shot president reagan in a twisted attempt to impress actress jodie foster. his state of mind was a hotly debated topic. we now have new insight from hinckley himself thanks to an astonishing document written in his own hand that after all these years is seeing the light of day. here again is troy roberts with "hinckley, diary of a dangerous mind." troy roberts: on the night he was arrested, hours after trying to kill the president, john hi