at the time , it was the deadliest mass shooting Use_firearm committed Commitment by a lone gunman in u.s. history , until it was surpassed Cause_change_of_position_on_a_scale by the 2016 orlando nightclub shooting Use_firearm .

In light of the investigative reports Reporting determining Deciding that `` reliable acoustic data do not support Supporting a conclusion Coming_to_believe that there was a second gunman '' , the U.S. Justice Department concluded Coming_to_believe active investigations Criminal_investigation and stated `` that no persuasive evidence can be identified Check to support Supporting the theory of a conspiracy Committing_crime in ... the assassination Killing of President Kennedy '' .

The gunman , 22-year-old Jacob Tyler Roberts , ran Self_motion into the shopping center wearing Wearing tactical clothing and a hockey mask and opened fire Use_firearm on shoppers and employees with a stolen Stag Arms AR-15 rifle .

The sole remaining Presence gunman was prosecuted Judgment_communication and served Assistance 27 years in British prisons .

The gunman killed Killing one person and wounded Bodily_harm six others before taking Conquering his own life with a gunshot Attack to the head .

The 2014 Sydney hostage crisis Confronting_problem , also known as the Sydney siege Besieging and Lindt Cafe siege Besieging , occurred Coming_to_be on 15–16 December 2014 when a lone gunman , Man Haron Monis , held Hold hostage ten customers and eight employees of a Lindt chocolate café in the APA Building in Martin Place in Sydney , Australia .

Monis was described Check by Abbott as having indicated Statement a `` political motivation , '' but the eventual assessment Judgment_communication was that the gunman was `` a very unusual casea rare mix of extremism , mental health problems and plain criminality . ''

over one hundred police , including armed offenders squad and special tactics group members , were brought in Bringing to cordon and contain the gunman , who was identified as a former territorial soldier .

at around midday on 9 may police found Know the gunman dead Death inside the master bedroom of the house .

The Cumbria shootings Killing was a shooting Killing spree which occurred Coming_to_be on 2 June 2010 when a lone gunman , Derrick Bird , killed Killing 12 people and injured Bodily_harm 11 others before killing Killing himself in Cumbria , England .

the first shooting Use_firearm took place Process_start on 14 february at a small public afternoon event called `` art , blasphemy and freedom Change_of_leadership of expression '' at the unk cultural centre , where an armed gunman killed Killing one civilian and wounded Bodily_harm three police officers .

A gunman killed Killing a young Jewish man on security duty during a bat mitzvah celebration , and wounded Bodily_harm two police officers .

A gunman killed Killing at least 18 people , including 15 Iranians and another 7 were wounded Bodily_harm , including 5 Iranians in Diyala Governorate , Iraq .

The gunman , Mohammed Merah , was a 23-year-old French petty criminal Committing_crime of Algerian descent who was born and raised in Toulouse .

The 2010 Bratislava shooting Use_firearm , or Devínska Nová Ves shooting Use_firearm , occurred Coming_to_be on 30 August 2010 , when seven people were killed Killing and at least 17 were injured Bodily_harm by a lone gunman who opened Process_start fire in Devínska Nová Ves district in a suburb of the Slovak capital , Bratislava .

The gunman then committed Killing suicide Killing .