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Keeping Cell Phones Out of Jail Cells
Posted: 22-Apr-2011 [Source: BusinessWeek]

[A growing wave of companies have developed electronic devices that jam signals, find phones, or block calls from unapproved numbers in efforts to eliminate the use of cell phones by prison inmates.]

By Tom McNichol -- "The Bloods street gang is a known distributor. Charles Manson has had at least two. In April, one was used to start a riot in an Alabama prison. Much to the chagrin of corrections officials nationwide, inmates have discovered the advantages of using mobile phones to coordinate escapes, intimidate witnesses, and order retaliation against other prisoners."

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