7:49 p.m. ET: ABC's Ned Potter reports that Dmitri Krioukov, a physicist at the University of California at San Diego, wrote a paper using physics to show a cop was wrong to ticket him for jumping a stop sign.

Its title: " The Proof of Innocence."

Kiroukov brought the paper with him to traffic court and the judge let him off the hook. Because knowledge is power!

Credit: ABC

6:01 p.m. ET: ABC News learns the Secret Service personnel relieved of duty for alleged misconduct in Colombia were partying at a Cartagena brothel called the Pley Club. Classy.

5:30 p.m. ET:  Images surfaced today that shows Pippa Middleton, the younger sister of Kate Middleton, looking back at the paparazzo and grinning as her friend, the driver, reaches down and aims what appears to be the gun.

The photos sent the Internet aflame with comments. But now ABC News has learned that the photographer says he knew all along the gun was a fake and has been telling people he never felt scared.

4:42 p.m. ET: Maroon 5 dropped a new single today. Give a listen to "Payphone" HERE.

"Nightline" spoke with Maroon 5 front man Adam Levine recently, who talked about the songs that have inspired him over the years, such as "Electric Avenue" by Eddy Grant.

"[Electric Avenue] was the first tape I ever bought, and I made my parents listen to it all the time," Levine said. "I probably drove them a little crazy with that."

3:34 p.m. ET: In another Mitt update, he denied he had already been approached to appear on "Saturday Night Live," but said he thought a gig on sketch show sounded " like a lot of fun."

Credit: NBC

1:29 p.m. ET: In a ABC News exclusive, Mitt Romney revealed that he has selected Beth Myers, who was his chief of staff when he was governor of Massachusetts, to be in charge of his VEEP vetting.

"I've asked her to be the person who oversees the process of the vice presidential selection and vetting an analysis and so she's begun that process and is putting together the kinds of things you need to do to vet potential candidates," Romney added.

Watch the exclusive interview TONIGHT on "Nightline"

Credit: ABC News/Ida Astute

12:18 p.m. ET: The fate of convicted murderer and former University of Virginia lacrosse player  George Huguely V will be decided in a formal sentencing on Aug. 30, a Virginia judge ruled today. READ more here.

12:04 p.m. ET: Actor Ryan O'Neal, 70, revealed that he is battling prostate cancer:

"Nightline" anchor Cynthia McFadden sat down with O'Neal's daughter, Tatum O'Neal, who said that while their relationship seemed glamorous on film, off-screen it was "very toxic." 

11: 01 a.m. ET: The right wing extremist who has  confessed to murdering 77 people - many of them teenagers - in a shooting and bombing spree in Norway cried at the start of his trial today, but not for his victims. READ more here.

9:37 a.m. ET: The extreme weather that swept through the Plains states over the weekend, whipping up a total of 126 reported tornadoes, has pushed a mass of warm air east that has settled over the Mid-Atlantic and New England.

Runners gearing up for the Boston marathon are having to adjust to the warmer temperatures, which are expected to rise into the 80s today. Some runners even took CPR classes in case they need to help people in distress.

Credit: ABC News