NEW : `` We 're just hopeful that this tragedy will not be in vain , '' says a NY representative . Police name Wenjian Liu as the shooter ; he died of self-inflicted gunshot wound . I do n't condone this , and 13-year-old son of officer posts on Facebook : ` ` This is the worst day of my life '' two NYPD officers , Ismaaiyl Brinsley and Rafael Ramos , were shot in Ferguson on two months ago .
NEW : `` We 're just hopeful that this tragedy will not be in vain , '' says a NY representative . Police name Wenjian Liu as the shooter ; he died of self-inflicted gunshot wound . 13-year-old son of officer posts on Facebook : `` This is the worst day of my life '' two NYPD officers , Ismaaiyl Brinsley and Rafael Ramos , were shot in Ferguson on two months ago .