aps ▁in ▁reporting ▁to ▁the ▁federal ▁background - check ▁system ▁intended ▁to ▁ban ▁conv icted ▁domestic ▁ab users , ▁such ▁as ▁K elle y , ▁from ▁purch asing ▁guns . ▁Since ▁ 1 9 9 6 , ▁the ▁La uten berg ▁Am end ment ▁has ▁prohib ited ▁the ▁sale ▁of ▁fire ar ms ▁to ▁those ▁conv icted ▁of ▁domestic ▁ab use ▁off enses , ▁even ▁mis de mean ors , ▁but ▁g aps ▁in ▁reporting ▁continue ▁to ▁exist . ▁ ▁President ▁Donald ▁Trump , ▁in ▁Japan ▁at ▁the ▁time ▁of ▁the ▁shooting , ▁said ▁at ▁a ▁press ▁conference ▁in ▁Tokyo ▁that ▁" I ▁think ▁that ▁mental ▁health ▁is ▁a ▁problem ▁here . ▁Based ▁on ▁pre lim inary ▁reports , ▁this ▁was ▁a ▁very ▁der anged ▁individual ▁with ▁a ▁lot ▁of ▁problems ▁over ▁a ▁very ▁long ▁period ▁of ▁time . ▁We ▁have ▁a ▁lot ▁of ▁mental ▁health ▁problems ▁in ▁our ▁country , ▁as ▁do ▁other ▁countries , ▁but ▁this ▁isn ' t ▁a ▁guns ▁situation ▁... ▁we ▁could ▁go ▁into ▁it ▁but ▁it ' s ▁a ▁little ▁bit ▁soon ▁to ▁go ▁into ▁it . ▁Fort un ately ▁somebody ▁else ▁had ▁a ▁gun ▁that ▁was ▁shooting ▁in ▁the ▁opposite ▁direction , ▁otherwise ▁it ▁wouldn ’ t ▁have ▁been ▁as ▁bad ▁as ▁it ▁was , ▁it ▁would ▁have ▁been ▁much ▁worse ". ▁Trump ▁was ▁asked ▁about ▁gun ▁policy ▁while ▁visit ing ▁Se oul , ▁South ▁Korea . ▁In ▁response ▁to ▁a ▁proposal ▁for ▁extreme ▁v et ting ▁of ▁gun ▁ownership , ▁Trump ▁said ▁that ▁this ▁would