Anderson Cooper 360

The clock is ticking on Capitol Hill. With the government about two days from a shutdown, President-elect Trump brought his own party to a halt with new demands on the spending bill, and only after a push from Elon Musk. Democratic congressman Dan Goldman from New York reacts to Trump and Musk's efforts to kill this bill. Plus, the suspect in the UnitedHealthcare CEO shooting could soon be on his way to New York to face local charges. Could federal charges also happen?

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A Manhattan grand jury on Tuesday indicted Luigi Mangione for murder as an act of terrorism in the death of UnitedHealthcare CEO Brian Thompson, according to newly released court documents. Mangione faces 11 counts, including one of murder in the first-degree and two of murder in the second-degree in Thompson’s killing on December 4 in New York, along with other weapon and forgery charges, the indictment says. Why authorities decided to seek that rare-for-New York charge, and what they will need to do to make it stick. Plus, new developments tonight in the wake of yesterday's school shooting in Madison, WI and all we're learning about what motivated the 15-year-old girl responsible.

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A shooting at the Abundant Life Christian School in Madison, WI, Monday morning left one student and one teacher dead, and six others injured. According to a law enforcement official, the shooter was a 15-year-old female student at the school and is believed to have died from a self-inflicted wound. The latest details we're learning tonight, including new reporting from a law enforcement official familiar with the investigation that the shooter planned the attack in advance. Plus, Judge Juan Merchan ruled President-elect Donald Trump does not have immunity from prosecution in the New York hush money case in which a jury found him guilty earlier this year. Two former federal prosecutors and CNN's Kara Scannell on what this means for Trump.

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The highest-ranking government official yet, Homeland Security Secretary Alejandro Mayorkas told CNN "we know of no threat" to the American public, in regard to the unidentified drone sightings over parts of the U.S. Federal agencies are facing intense pressure to give the public more details on the drone sightings going on for weeks over neighborhoods as well as restricted sites and critical infrastructure. Plus, President-elect Trump has praised the polio vaccine as the “greatest thing,” but a lawyer has petitioned the FDA to revoke approval of the vaccine used in the United States. Turns out that attorney is now an adviser to Trump’s pick to run HHS, Robert F. Kennedy Jr. Senate Minority Leader Mitch McConnell, himself a polio survivor, issued a warning about the issue Friday that was apparently intended for Kennedy.

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Sources are telling CNN that authorities have executed as many as three search warrants in New York as part of their investigation into the killing of UnitedHealthcare CEO Brian Thompson. At least two of the warrants include the backpack found in Central Park and the burner phone found near where the shooting occurred, according to a law enforcement source with knowledge of the investigation. Anderson shares what we have learned so far, and what we still don't know about the suspect. Plus, what the White House said today about the mysterious drones flying at nighttime over many parts of New Jersey.

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New York police now say the 3D-printed gun that CEO killing suspect Luigi Mangione had when he was arrested in Pennsylvania this week matches shell casings at the crime scene. Mangione’s fingerprints also match those investigators found on items near the scene, NYPD Commissioner Jessica Tisch said on Wednesday. Plus, a clearer timeline on when Mangione’s mother reported him missing and when at that time she said she last spoke with him. And, for weeks, mysterious drones have been flying low over parts of New Jersey. Our Gary Tuchman has video of some of the drones and shares what officials are saying about the sightings.

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Tonight, a source tells CNN's John Miller that the alleged UnitedHealthcare CEO shooter made a to-do list for a killing, as well as notes justifying those plans. Law enforcement also said Mangione had a three-page handwritten “claim of responsibility” as police characterized his manifesto. In one notebook passage, Mangione concludes that using a bomb against his intended victim “could kill innocents” but shooting would be more targeted, musing what could be better than “to kill the CEO at his own bean counting conference." Plus, a tip from the public was the key to the apprehension of Luigi Mangione, Randi Kaye takes a look at other high-profile investigations that came to a close with the help of good Samaritans.

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We examine how the suspected New York CEO killer was caught and what the police found tying him to the crime. Plus, a look at the suspect’s background and why he was almost invisible to authorities in the days before his capture. Also, a report from inside Syria and what’s being found after the fall of its brutal dictator. 

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The NYPD told the New York Times investigators are looking into the possibility the gunman who killed UnitedHealthcare CEO Brian Thompson may have used what is known as a veterinary gun, a larger firearm used on farms and ranches. Also Friday, a backpack believed to belong to the suspect was found in Central Park, a law enforcement official told CNN. Plus, the race to identify the UnitedHealthcare CEO shooter is hardly the first time a manhunt captivated the nation's attention. What can high-profile investigations into the Boston Marathon bombing and DC Sniper tell us about how the current search might end? CNN's Brian Todd takes a look. 

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CNN is learning more details about the alleged gunman's movements prior to the fatal shooting of UnitedHealthcare CEO Brian Thompson. Police believe the gunman arrived in New York City on November 24th, 10 days before the shooting, a law enforcement official told CNN. He arrived at the Port Authority bus terminal in Manhattan and then went to a hostel on the Upper West Side of Manhattan. Earlier Thursday, the NYPD released new images of an unmasked “person of interest wanted for questioning” over the killing. Our law enforcement experts including CNN Chief Law Enforcement and Intelligence Analyst John Miller, former FBI Deputy Director Andrew McCabe, and former FBI Special Agent Bryanna Fox break down the latest developments in the case.

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