Barack Obama was sworn in as America's 44th president 1,425 days ago. Since then, five of the 12 deadliest mass shootings in our history have happened. Here they are, as well as other lesser mass gun-killings that happened under his watch.

Jared Lee Loughner was sentenced to life in prison after he pleaded guilty to shooting Gabby Giffords and 18 others.

We've spent so much time focused on James Holmes and the Aurora shooting that we haven't heard much about Jared Lee Loughner, the last psychopath who opened fire on a crowd.

Jared Lee Loughner returned to court today, where authorities established that the accused mass murderer is still insane. According to a government psychiatrist, Loughner believes he killed Gabrielle Giffords, has "several imaginary friends," and lost TV privileges because he thought the tube was sending him messages. When doctors informed him that he is insane, he was reportedly "devastated." [NYT, images via AP]

Almost six months after being shot outside a Tucson supermarket by gunman Jared Lee Loughner, Arizona Congresswoman Gabrielle Giffords is almost ready to leave the Houston rehab facility where she's been staying. Where she'll go is still unknown, but friends say she wants to return home.

Jared Lee Loughner, the gunman who killed six people and wounded 12 others including Rep. Gabrielle Giffords, was ruled mentally incompetent to stand trial today.

Jared Lee Loughner, the nutter who (allegedly!) shot Rep. Gabrielle Giffords and about 20 others in Tucson earlier this year, will undergo a month-long psychological exam to determine if he's fit to stand trial.

Jared Lee Loughner, the man accused in the January shooting spree in Tucson, was indicted on additional federal murder charges by a grand jury yesterday for allegedly murdering "participants at a federally provided activity," the Justice Department announced Friday.

The U.S. Marshals service has released two new photos of alleged Gabrielle Giffords gunman Jared Lee Loughner after a federal judge ruled that it was permissible. And, yep, he still looks nuts. Less nuts, maybe, but... definitely still nuts.

Before the Tucson shooting, cops says suspect Jared Lee Loughner looked up information about previous political assassinations and websites about lethal injections. How long until someone blames the shooting on the Wikipedia entry for John Wilkes Booth?

Jared Lee Loughner, the 22-year-old accused of attempting to assassinate Rep. Gabrielle Giffords and killing several others in a mass shooting spree in Arizona earlier this month, pleaded not guilty in federal court in Phoenix on Monday.

Jared Loughner: just another loser who didn't understand Nietzsche.

Looks like alleged Arizona gunman Jared Loughner will be tried in San Diego. Can't think of a better place.

According to the New York Times, investigators have obtained photographs, apparently taken by Tucson gunman Jared Loughner, of Loughner holding a gun against his "naked buttocks" and crotch.

A new face from the Jared Loughner universe has emerged. Kelsey Hawkes was Loughner's girlfriend six years ago. How was Jared then, Kelsey? Great! His parents? Great! Any violent tendencies? None. Jared Loughner was a real Casanova. Video inside.

In her response to accusations her violent rhetoric was connected to Jared Loughner's shooting spree, Sarah Palin claimed that media figures had manufactured a "blood libel" against her. How would the Anti-Defamation League, the Jewish civil rights group, take this?

What did Jared Lee Loughner talk about in his online video game forums? Violent, angry things, of course, under the names Heroin, XTC and Erad.

The New York Times has spoken with a friend of alleged Gabrielle Giffords shooter Jared Loughner and discovered some warning signs others should have picked up on. Like: It turns out the suspected would-be assassin... kept a dream journal!

Tonight, Jon Stewart opened with a segment about Saturday's deadly shooting in Arizona, and immediately noted that he didn't know what to say about it/how to process it. Notwithstanding, his speech that followed was incredibly heartfelt and insightful. Watch inside.

On tonight's AC360, Anderson Cooper interviewed Bill Maher about Saturday's deadly Arizona shooting. After Cooper asked him if right-wing politicians/pundits can be blamed for it, Maher came out swinging—and even directly compared Glenn Beck to shooter Jared Loughner.