by:  Sen. Tom Cotton | Fox News

Earlier this year, we learned that Martin Shkreli, a conman and convicted felon, was secretly running an investment company from prison using a contraband cell phone.

Shkreli, also known as the “Pharma Bro,” achieved infamy in 2015 for jacking up the price of a medicine needed by a small group of very sick patients to enrich himself and his investors. He was convicted of fraud in 2017 and sent to prison.

Prison is supposed to keep criminals out of our communities, but as Shkreli’s example shows, contraband cell phones allow inmates to continue their crime sprees from behind bars. Jamming cell phone signals from prison is the most effective way to counteract this dangerous trend. But first, the federal government has to let us do it.