Law enforcement officials held a press conference Thursday night with the latest details about a Southern California shooting that left at least two people dead. Source

Officials say the suspected gunman in Thursday’s deadly school shooting in Santa Clarita, California, posted on social media just hours before his rampage. CBS News law enforcement and security analyst Paul Viollis joins CBSN’s Elaine Quijano for a closer look at the events. Source

Astronomers zero in on some of the most mystifying phenomena in the universe Source

Lawmakers are responding to the first day of public testimony in the impeachment inquiry into President Trump. CBS News chief Washington correspondent Major Garrett and New York Times congressional correspondent Sheryl Gay Stolberg join CBSN’s “Red & Blue” to discuss the latest. Source

Louisiana’s runoff race for governor is the last U.S. election of the year. Voters head to the polls Saturday, and the race is a dead heat. Elizabeth Crisp, a political reporter for The Advocate, joins CBSN’s “Red & Blue” to discuss what issues are important for voters. Source

With smartphones and wireless internet, gaining access to pornography has never been easier for young people. But experts say early exposure to porn can “rewire” young people’s brains, distort their views of sexual behavior, and even contribute to dating violence. CBSN Originals explores the issue in the documentary “Speaking Frankly: Porn.” Watch the full story at cbsnews.com/porn. Source

New details are emerging about Colin Kaepernick’s possible return to the football field. The quarterback, sidelined since protesting the national anthem, has now been invited to try out for NFL teams. James Brown spoke with NFL Commissioner Roger Goodell. Source

Russia confirmed it’s setting up a new base in the Syrian city of Qamishli. Yet, for all the security forces now jostling for control, they’ve been unable to ensure security for the local population. Charlie D’Agata reports from northeast Syria. Source

One of the world’s most popular tourist destinations was declared a disaster on Thursday. Venice, Italy, has been swamped by the worst flooding in a half-century. As Holly Williams reports, the damage has left the city in deep trouble. Source

Odds are already being placed at which team has the best chance to land Kaepernick — if he decides to sign Source