▁population ▁increased ▁gradually ▁to ▁ 1 3 , 9 1 3 ▁in ▁ 1 9 1 0 , ▁ 2 0 , 2 9 2 ▁in ▁ 1 9 2 0 , ▁and ▁ 3 6 , 8 1 8 ▁in ▁ 1 9 4 0 . ▁In ▁ 2 0 0 6 ▁the ▁population ▁of ▁P ima ▁County , ▁in ▁which ▁T uc son ▁is ▁located , ▁passed ▁one ▁million ▁while ▁the ▁City ▁of ▁T uc son ' s ▁population ▁was ▁ 5 3 5 , 0 0 0 . ▁ ▁Crime ▁In ▁late ▁January ▁ 1 9 3 4 , ▁five ▁members ▁of ▁the ▁D ill inger ▁gang , ▁including ▁John ▁D ill inger , ▁himself , ▁were ▁arrested ▁in ▁T uc son . ▁They ▁were ▁five ▁of ▁the ▁top ▁six ▁names ▁on ▁the ▁F BI ' s ▁first ▁Public ▁En emy ▁list . ▁A ▁fire ▁allowed ▁fire men ▁to ▁discover ▁their ▁identity ▁and ▁the ▁police ▁prompt ly ▁arrested ▁Harry ▁Pier pont , ▁Charles ▁Mak ley , ▁Russell ▁Clark , ▁Ed ▁Sh ouse , ▁and ▁D ill inger . ▁The ▁police ▁found ▁the ▁gang ▁in ▁possession ▁of ▁over ▁$ 2 5 , 0 0 0 ▁in ▁c ash , ▁three ▁sub - machine ▁guns , ▁and ▁five ▁machine ▁guns . ▁T uc son ▁celebr ates ▁the ▁historic ▁arrest ▁with ▁an ▁annual ▁" D ill inger ▁Days " ▁festival , ▁the ▁highlight ▁of ▁which ▁is ▁a ▁re en act ment . ▁ ▁H osp it als ▁In ▁ 1 9 1 9