Lawyers for former Boston mob boss James "Whitey" Bulger are set to challenge his 2013 racketeering conviction on Monday, contending a judge wrongly blocked them from arguing that a U.S. official had given him immunity for his crimes.
The FBI still has not determined whether the suspect in the fatal shootings of five U.S. servicemen in Tennessee last week was radicalized in the run-up to the rampage, the special agent in charge of the investigation said on Wednesday.
The death of an Illinois woman found hanged in her Texas jail cell in what local authorities said was a suicide will be investigated as thoroughly as a murder, the local district attorney said on Monday.
Hours before the Tennessee shooting that killed five U.S. servicemen, the suspected gunman texted a close friend a link to an Islamic verse that included the line: "Whosoever shows enmity to a friend of Mine, then I have declared war against him."
Jeffrey Webb, one of seven high-ranking officials of soccer's world governing body FIFA who were arrested in Switzerland on corruption charges, pleaded not guilty in U.S. federal court on Saturday.
The suspect in the killings of nine black churchgoers in Charleston, South Carolina, was able to buy a gun because of mistakes in a background check that should have revealed an admission of drug possession, Federal Bureau of Investigation Director James Comey said on Friday.
U.S. authorities foiled attacks planned around the Fourth of July, arresting more than 10 people in the month before the holiday who were inspired by Islamic State online recruitment, FBI Director James Comey said on Thursday.
The Chinese hacking group suspected of stealing sensitive information about millions of current and former U.S. government employees has a different mission and organizational structure than the military hackers who have been accused of other U.S. data breaches, according to people familiar with the matter.
Hundreds of law enforcement agents hunting for two upstate New York prison escapees focused their search on Thursday on a heavily wooded area just a few miles from the maximum security facility where they broke out last week, police said.
Two jail guards who have worked at New York City's Rikers Island complex were arrested on Wednesday on federal charges stemming from an assault that led to the death of an inmate there in December 2012.
Former U.S. House of Representatives Speaker Dennis Hastert pleaded not guilty in a packed Chicago courtroom on Tuesday to federal charges of trying to hide large cash transactions and lying to the FBI about it.
A man accused of plotting a suicide bomb attack at a Wichita, Kansas, airport in 2013 pleaded guilty on Monday in U.S. District Court to a charge of attempted use of a weapon of mass destruction.
Two college friends of the Boston Marathon bomber were sentenced to prison on Friday for removing a backpack containing empty fireworks shells from Dzhokhar Tsarnaev's dorm room amid a massive manhunt three days after the deadly 2013 attack.
Hackers broke into U.S. government computers, possibly compromising the personal data of 4 million current and former federal employees, and investigators were probing whether the culprits were based in China, U.S. officials said on Thursday.
A friend of the Boston Marathon bomber who admitted to obstructing the investigation into the deadly 2013 blast, one of the highest-visibility attacks on U.S. soil since Sept. 11, 2001, is set to be sentenced on Tuesday.
At 3:59 p.m. EDT on Sunday, the National Security Agency and telecommunications companies will begin mothballing a once-secret system that collected Americans' bulk telephone records, shutting down computers and sealing off warehouses of digital data.
Former U.S. House of Representatives Speaker Dennis Hastert, indicted on Thursday on federal criminal charges, was paying a male from his past to try to conceal sexual misconduct, the Los Angeles Times reported on Friday, citing two unnamed federal law enforcement officials.
Security researcher Chris Roberts made headlines last month when he was hauled off a plane in New York by the FBI and accused of hacking into flight controls via his underseat entertainment unit.
The FBI has arrested two men in southern California, one at Los Angeles International Airport, suspected of attempting to travel abroad to join Islamic State, NBC News reported on Thursday.
U.S. federal investigators have found no record that the engineer of the Amtrak commuter train that crashed in Philadelphia last week reported an object hit his locomotive in the minutes before it derailed, a U.S. official said on Sunday.
The Federal Bureau of Investigation warned police in Garland, Texas, about three hours before a shooting at an exhibit of caricatures of the Prophet Mohammad that a gunman who launched a failed attack was interested in the event, FBI Director James Comey said on Thursday.
