ABOUT THE SHOOTER. Updating coverage: After the shooting and killing of at least 50 people and the wounding of more than 400 others at a Jason Aldean concert in Las Vegas, details on the person responsible are emerging.
■ Police believe he committed suicide after firing the fatal shots from his 32nd floor hotel room; they found at least 10 guns there.
■ Video: President Trump addresses the nation.
■ One concertgoer who says she hid in a sewer: “It was a horror show.”
■ The victims included at least two on-duty cops.
■ It’s now the deadliest shooting in modern American history—and they’re getting much deadlier.
■ Predictably, online hoaxes spread quickly.
■ … And gun stocks rose.
■ Journalist and TV creator David Simon (The Wire, Homicide: Life on the Street) on Twitter: “Today marks the first, fresh day of being told now isn’t the time to discuss gun control.”
■ Advice to journalists covering mass shootings.
■ Chicago cops are expanding their use of gunshot-detection tech.
■ A Republican bill in Wisconsin would let felons and people subject to domestic abuse restraining orders own antique guns.
■ The Onion posts a timeless piece again: "‘No Way To Prevent This,’ Says Only Nation Where This Regularly Happens."
‘BIGOTRY, BASELESS CONSPIRACY, AND A MASSIVE BLACK HOLE OF EGO.’ Sun-Times columnist Neil Steinberg says Trump’s tweets about Puerto Rico expose “the three legs of Trump’s world.”
■ Chicago Congressman Luis Gutierrez, who has a condo in Puerto Rico: “FEMA is not going to be enough.”
■ But, hey—Trump dedicated a golf trophy to hurricane victims.
■ Undermining his Secretary of State on North Korea, Trump tweeted: “I told Rex Tillerson … he is wasting his time trying to negotiate with Little Rocket Man ... Save your energy Rex, we’ll do what has to be done!”
■ Rat complaints are on the rise in Chicago’s densest neighborhoods.
■ A Chicago suburb that was once a tourist magnet is struggling to escape its newer reputation as a “ghost town.”
‘I WILL NOT BE A STADIUM PATRIOT.’ On Facebook, columnist Mike Royko’s son resurrects his dad’s 1972 piece ridiculing sports events’ national anthem traditions.
■ The NFL’s political struggles Sunday included boos in Baltimore and a pledge in Indianapolis: “This is just the beginning.”
■ A Texas high school coach kicked two players off his team for taking a knee and raising a fist.
ADIOS, FREE CLICK. Google’s ending its policy of demanding publishers offer at least the first three articles free each day as a condition for appearing in search results.
■ Facebook is set to give Congress 3,000 ads linked to Russians. (Corrected number.)
■ Cher—yes, that Cher—is suing a major stockholder of the Tribune’s parent, Tronc, accusing him of stock sale fraud.
‘YOU ARE KIDDING ME.’ That’s the reaction of one of three winners of the Nobel Prize for medicine, honored for their work explaining how the biology of plants, animals and humans adapts to synchronize with the Earth’s revolutions. (Image: NobelPrize.org.)
■ Their research has guided insight into humans’ alertness, sleep patterns, blood pressure, hormones, body temperature and appetite.
‘IT WAS PRETTY RIDICULOUS THAT HE … WAS POSITIONED AS THE SAVIOR OF JAZZ IN … LA LA LAND.’ The Trib’s Nina Metz reviews the Saturday Night Live premiere and gives a thumb up to Ryan Gosling’s monologue—but not much else.
■ Preview of tonight’s new X-Men series on Fox: “If you’re told to decide between Marvel’s Inhumans and The Gifted, choose The Gifted.”