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Know It All: Top stories at NBC News

19-year-old Boston Marathon bombing suspect Dzhokhar Tsarnaev raises his hand from a boat at the time of his capture by law enforcement authorities in Watertown, Mass.
19-year-old Boston Marathon bombing suspect Dzhokhar Tsarnaev raises his hand from a boat at the time of his capture by law enforcement authorities in Watertown, Mass.Sean Murphy / Mass. State Police via AP

Tsarnaev wounds extensive: documents

Newly unsealed court documents reveal the extent of the injuries Boston marathon bombing suspect Dzhokhar Tsarnaev suffered before his capture in April. According to testimony by a trauma surgeon who treated Tsarnaev, the injuries included a gunshot wound that appeared to enter through the left inside of his mouth and exit through the lower left side of his face. Read it here.

Fort Hood trial turns to defense

Maj. Nidal Hasan, accused in the 2009 shooting rampage at Fort Hood that killed 13 and wounded dozens, is about to get his best chance yet to try to explain his actions. The Army psychiatrist, acting as his own attorney, will be given the opportunity Tuesday to present his defense. But Hasan has kept mostly silent for two weeks as prosecutors called more than 80 witnesses to testify about the attack. Read it here.

‘Bored’ teens gun down jogger: police

An Australian baseball player out for a jog in an Oklahoma neighborhood was shot and killed by three "bored" teenagers who decided to kill someone for fun, police said. Christopher Lane, visiting his girlfriend, passed the house of three teens who police say shot him at random. The teens are expected to be arraigned in court on Tuesday. Read it here.

San Diego mayor's future murky

Negotiations are expected to continue Tuesday between embattled San Diego Mayor Bob Filner and city attorneys over the mayor’s future. Filner, who is accused of sexual harassment in a lawsuit, also faces a formal recall effort and federal and local investigations into his behavior on the job. Read it here.

It's a two-dog White House

There’s a new Portuguese water dog romping in the West Wing. Say hello to Sunny, the newest member of the First Family. The White House introduced the female pup, who is a little over a year old, in blog post Monday. Read it here.

Report: A-Rod set to sue  

ESPNNewYork.com reports that lawyers for New York Yankees slugger Alex Rodriguez are preparing a malpractice suit against a team doctor for misdiagnosing the Bronx bomber’s hip injury during last season’s playoffs. A-Rod and the Yankees take the field in the Bronx on Tuesday night. Read it here.

A dogfish-eat-dogfish world

Everyone knows the story: The little fish gets eaten by a big fish, and the big fish gets eaten by an even bigger fish, and so on. So it went in Delaware Bay before shocked scientists, when a dogfish that took the bait from researchers was quickly gobbled up by a sand tiger shark. Read it here.

-- The Associated Press contributed to this report