While it is not clear what motivated the lone gunman or from what disease he suffered, if any, few think he could have been right in his head.
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Feinstein contended her proposal would prohibit the kind of weapon used by a lone gunman in the Connecticut shooting.
Since the Newtown attack by a lone gunman, Connecticut and a few other states have passed tougher gun laws.
Focus on the general risk of troubled teens, and not the specific threat of a lone gunman wandering around a school.
Following the Newtown shootings by a lone gunman, Obama called for a series of proposals including "universal" background checks on all gun purchases.
Christian Fraser says the leaked report does not dispel French police's current working theory that the gunman was local and a "lone wolf".
Crabtree first ran across the issue following the Virginia Tech shooting, in which a lone gunman, a student, killed 32 people.
On Monday, the couple joined other Sandy Hook families to mark one month since the attack, which was carried out by lone gunman, Adam Lanza.
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In 1995, a lone gunman shot dead Burundi's Energy and Mines Minister Ernest Kabushemeye in the nation's capital, Bujumbura.
Although the common perception is that Mr Taseer was assassinated for his outspoken views on the blasphemy law in Pakistan, it would be very short-sighted to assume that a lone gunman decided to execute him for this reason alone.
That night, 12 people were killed and 58 more injured when a lone gunman opened fire in a cinema in Aurora, Colorado, during a midnight screening of The Dark Knight Rises.
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