Artificial intelligence is helping prisons and jails monitor inmate phone calls to learn of criminal activity and potential suicides. The technology uses speech recognition, semantic analytics and machine learning software to build databases of searchable words, ABC News reports. The technology companies notify law enforcement when the system picks up suspicious language. One company, LEO Technologies based in Los Angeles, sends investigators to prisons that use its services to add phrases and slang from the prison and surrounding area to its database. Inmates are warned that their calls are being recorded, but they make incriminating statements on the phone anyway.