Video: Audio of Discovery gunman released: ‘I have a bomb and a gun’
A tense standoff between a hostage-taker and police at the headquarters of the Discovery Channel lasted about four hours Wednesday before Maryland police shot the gunman and rescued the small number of hostages he was holding. NBC's Tom Costello reports. (Nightly News)

Video: How did ‘Grim Sleeper’ suspect elude police?
After a killer eluded authorities for more than two decades, police finally apprehended a suspect. As NBC’s George Lewis reports, investigators are checking to see if he can be linked to dozens of killings. (Nightly News)

Video: Suspect arrested in day care shooting of father
Police in Georgia say the suspect they have charged with killing a man in front of his son's preschool had ties to the victim's wife. NBC’s Than Truong reports. (TODAY show)

Video: Boyfriend won’t talk to police about missing woman
Authorities in Florida's Pinellas County continue to search for police recruit, Kelly Rothwell, missing since March 13. Her live-in boyfriend, who is not a suspect, has refused to talk to police about the disappearance. NBC's Mark Potter reports. (TODAY)

Video: Discovery suspect holding hostages
NBC's Pete Williams reports police are not confirming the ID of the Discovery Building incident, but do confirm that the suspect is holding hostages in the building and has a history of grievances against the company. (Other)

Video: Police reopen Natalie Wood case
The investigation into Natalie Wood's 1981 death has been reopened, but police say her husband Robert Wagner is not a suspect in the actress' drowning. NBC’s George Lewis has more. (Nightly News)

Video: Judge blocks parts of Ariz. immigration law
A last-minute ruling by a federal judge delayed the most controversial provisions, including the right for police to check the immigration status of anyone they suspect of being in the U.S. illegally. NBC’s Pete Williams reports. (Today Show)

Video: Quick-thinking girl, 9, escapes captor
A brave little girl is being hailed for her courage and composure after she escaped from a man who kidnapped her and managed to summon police, who took a suspect into custody. Following a report by NBC’s George Lewis, former FBI profiler Clint van Zandt talks about the case. (TODAY)

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Video: Suspect may have explosive device
Montgomery County, Maryland police say they can't confirm the ID of the man who entered the Discovery building brandishing a gun, but that he is holding hostages and may have an explosive device. (Other)