WMAR ABC2 News At 6PM April 30, 2013
>> these 13 corrections officers being charged are small, small, small percentage of bad apples. >> reporter: union leaders say they believe the corruption goes high are up. >> i don't believe the buck stops with the 13. >> reporter: the root, thy say, lies in understaffed prisons. and allow has street gang to take over. >> every institution, staffing level is low and on top of that right now they're collapsing posts inside the institutions to save on overtime. >> reporter: this week the department of corrections began issuing polygraph tests to administrators to see what anyone knew...