2 2 0 ▁after ▁a ▁new , ▁larger ▁post ▁office ▁was ▁built ▁in ▁Middle ▁River ▁to ▁serve ▁the ▁entire ▁area . ▁The ▁old ▁zip ▁code ▁( 2 1 0 2 7 ) ▁and ▁post ▁office ▁remain ▁for ▁the ▁purpose ▁of ▁P . O . ▁boxes . ▁ ▁On ▁January ▁ 4 , ▁ 1 9 8 7 , ▁Am tra k ▁Train ▁ 9 4 ▁crash ed ▁into ▁a ▁Con ra il ▁fre ight ▁locomot ive ▁in ▁Ch ase . ▁The ▁Con ra il ▁engineer ▁had ▁been ▁sm oking ▁mar iju ana , ▁which ▁caused ▁him ▁to ▁miss ▁numerous ▁warning ▁signals . ▁Four teen ▁passengers ▁were ▁killed , ▁making ▁this ▁Am tra k ' s ▁dead liest ▁crash ▁ever ▁at ▁the ▁time . ▁The ▁crash ▁became ▁national ▁news ▁and ▁led ▁to ▁new ▁safety ▁reg ulations ▁and ▁drug ▁testing ▁in ▁the ▁rail road ▁industry . ▁The ▁crash ▁also ▁caught ▁the ▁attention ▁of ▁President ▁Ron ald ▁Re agan , ▁who ▁hon ored ▁some ▁of ▁the ▁local ▁people ▁of ▁Ch ase ▁for ▁helping ▁passengers ▁who ▁escaped ▁sh aken ▁but ▁un har med ▁from ▁the ▁trains . ▁ ▁For ▁more ▁see ▁Ch ase , ▁Maryland ▁rail ▁w reck . ▁ ▁On ▁March ▁ 7 , ▁ 2 0 0 0 , ▁Joseph ▁Pal cz yn ski ▁murder ed ▁three ▁people ▁in ▁an ▁a partment ▁complex ▁in ▁nearby ▁Bow le ys ▁Qu arters . ▁The ▁next ▁day ▁he ▁murder ed ▁a ▁fourth ▁victim ▁in ▁Ch ase . ▁Pal cz yn ski ▁was ▁raised ▁in ▁Ch ase , ▁and