さっき素行(そこう)の悪(わる)そうな子(こ)がそこの倉庫(そうこ)の横(よこ)の側溝(そっこう)に落(お)ちたよ。
Just now a boy who looks like a delinquent fell down into the gutter next to the warehouse there.
素行(そこう)one’s usual behaviour
そこ there near you
倉庫(そうこ) a warehouse
側溝(そっこう)a gutter, a ditch