A gunman opened fire Monday at the Washington Navy Yard in Washington D.C., killing at least 12 people, authorities said.
Here are some of the top stories we're following at NBC News on Tuesday:
Gunman's death leaves many questions unanswered: Authorities scoured Aaron Alexis’ hotel room and his background, seeking clues into his motive for his attack on the Washington, D.C., Navy Yard on Monday. The 34-year-old served in the Navy and was haunted by his purported work as a 9/11 rescuer in New York City, his father has said. Read more at NBC News.
Victims' stories emerge from deadly rampage: As the names of the victims of Monday’s shooting rampage emerge, so do their stories, many about long careers at the Navy Yard. Eight of the 12 victims have been publicly identified by authorities. Read more at NBC News.
Break in weather brings relief to Colorado: There’s some good news finally for Colorado, where floods have killed eight people and have ravaged a 200-square-mile swath of the state. More than 500 people were removed from a list of those unaccounted for after weather conditions finally allowed authorities into cutoff mountain communities. Read more at NBC News.
Investigation: Cop peeked look at Houston's body: A Beverly Hills police sergeant disturbed the scene of Whitney Houston’s death in 2012, according to a claim filed last week with the city, by lifting the sheet covering her naked body and commenting on how good the dead pop superstar looked. Read more at NBC News.
High school seniors still bingeing: Binge drinking among high school seniors may have declined slightly, but the rate of extreme bingeing -- people who knock back more than 10 drinks at a time -- has remained steady, a new study shows. Read more at NBC News.
New 'Grand Theft Auto' finally arrives: At midnight Tuesday, "Grand Theft Auto V," the newest installment in its wildly popular and often controversial series of open-world shooting games, hits the market. Rockstar Games expects the new Grand Theft Auto to outsell its predecessor — a serious feat given that it sold more than 25 million units during its five-and-a-half years on the market. Read more at NBC News.
Miley Cyrus calls off engagement: Somebody threw a monkey wrench into the twerks. Miley Cyrus’ engagement to The Hunger Games’ star Liam Hemsworth is off. Reps for the singer and the actor confirmed that their engagement is over, seemingly ending their four-year relationship. Read more at TODAY Entertainment.