WBAL.com

The parents of murder witness Carl S. Lackl will speak at a national correctional professionals trade show to advocate for cell phone jamming in prisons. Law enforcement official say that could reduce the amount of crime organized from behind bars.

Gary and Margaret Shipley, Lackl’s parents, are scheduled to appear Tuesday at the American Correctional Association trade show in Nashville alongside other advocates.

Lackl was going to be a witness in a Maryland murder trial against Baltimore drug dealer Patrick Byers, who was being held in prison on murder charges and ordered Lackl’s murder using an illegal cell phone, police say.

A U.S. Senate committee approved a measure this month that would allow states to seek permission to jam cell phones in correctional facilities.