. >> jack mcmahon is an attorney representing defendant and former guard mark thompson whose mother is a philadelphia police officer. >> what is the family's reaction? >> any mother, whether you're a philadelphia police officer or not, is going to be upset when their son gets indicted federally. probably doubly so when you're a law enforcement officer and good law enforcement officer like his mother. >> the accused guards could face decades in prison. >> we hope the message is clear. the philadelphia prison system will have no place to use the power of their decision to engage in powerful acts. >> what prison procedures may change as a result of all of this. i found out something that may surprise you. the prisons are not in his word saturated with video cameras. they are hoping to change that. live in center city, lauren mayk. nbc10 news. >>> a rally this evening in atlantic city. marking one year since a local man was shot and killed by police. relatives of sean brown say there's been a lack of answers and transparency from law enforcement. brown was armed with a handgun during a con

attorney jack mcmahon is representing former prison guard mark thompson who happens to be the son of the philadelphia police officer. >> any mother when are a philadelphia police officer or not, will be upset when your son gets indicted federally and probably doublely so when you are an law enforcement officer and good law enforcement officer. she's his mother. she's sticking by him. we're here to work our way through this. >> reporter: at lending inside job has outside as peck according to commissioner of prison, lewis, when it comes continue on mates with cell phones. >> they can use them to transfer messages, they can use them to intimidate witnesses, they can use them to further criminal enterprises if they choose to do so. is there a number of dangers presented by them. >> reporter: this investigation spans several local facilities, even though investigators say there is no evidence that these men were working together, or even knew when each other were up to now as for any current guards potentially being involved, in these kind of exchanges, right now the commissioner had this