<prompt> Fingqa isihloko: IBoston CNN Kwakuyi-9:35 ebusuku ngoLwesine ngo-Ephreli 2013 futhi uMphathi Wamaphoyisa eMassachusetts Institute of Technology uJohn DiFava wayesezoqeda. Lapho ephuma, wabona esinye sezikhulu zakhe ezishintshashintshayo, uSean Collier, ehleli emotweni yakhe. Wama ukuze athi ubusuku obuhle. Ngaxoxa naye imizuzu embalwa. Ngimtshele ukuthi aphephe ngahamba, kusho isikhulu enkantolo eyayigcwele ngoLwesithathu. Walinganisela ukuthi ingxoxo yathatha imizuzu emithathu, mhlawumbe emine. Ingabe wake wambona uSean Collier ephila ngemva kwalokho? Umsizi woMshushisi Wase-U.S. uWilliam Weinreb ubuzile. Angizange. Esikhathini esingaphansi kwehora kamuva, uCollier wayelala egazini emotweni yakhe yebutho ngemva kokuhlaselwa futhi wadutshulwa ekhanda. Umnyango wemoto yakhe wawuvulekile, futhi unyawo lwakhe lwaluboshelwe phakathi kwamabhuleki negesi. UDiFava namanye amaphoyisa, esizwa amavidiyo okuqapha, abantu abafonele i-911 kanye nomgibeli webhayisikili oyedwa owayedlula lapho, balandisa izikhathi zokugcina zikaCollier ekuqulweni kwecala lokubulawa kukaDzhokhar Tsarnaev, owavuma ukuthi wabulala umuntu owahlasela iBoston Marathon. Umgibeli wamabhayisikili, uNathan Harman, owayengumgqugquzeli we-Ph.D. yezibalo eMIT, wakhomba uTsarnaev enkantolo futhi wamveza njengendoda enempumulo enkulu, ayibona ithambekela emotweni kaCollier. Wathi kubonakala sengathi uTsarnaev uwedwa. UTsarnaev, owayeneminyaka engu - 19 ubudala ngaleso sikhathi, akaphikisi ukuthi wayekhona lapho kubulawa uCollier kusihlwa ngo - April 18, futhi akaphiki ukuthi waba nengxenye ekuqhumiseni amabhomu ezinsukwini ezintathu ngaphambili okwabulala abantu abathathu futhi kwalimaza abanye abangaphezu kuka - 240. Abashushisi bathi uTsarnaev nomfowabo omdala uTamerlan Tsarnaev babulala uCollier ngoba befuna isibhamu sakhe. Kodwa imizamo yabo yokulithatha yaphazanyiswa isivalo sokuphepha. I-FBI yayikhiphe izithombe zalaba ababili amahora amahlanu ngaphambili, futhi base bebaleka. Kodwa uTamerlan, oneminyaka engu-26 ubudala, wayengeke asinde ngalobo busuku. Wabulawa lapho edingiswa futhi edutshulwa namaphoyisa okwaqala ngokubikwa kwephoyisa elalimele eMIT. Amaphoyisa e-MIT, aqokwe njengezikhulu ezikhethekile yi-Massachusetts State Police, ahlola ikhampasi ebanzi eCambridge...  <response>: Ubufakazi bugxile ekudutshulweni kwesikhulu se-MIT, esineminyaka engu-26 ubudala. USean Collier wabulawa ezinsukwini ezintathu ngemva kokuqhuma kwamabhomu eBoston. Umgibeli wamabhayisikili ukhomba uTsarnaev, umfaka endaweni yokubulawa kukaCollier. 