We are living at times where criminal and terror attacks have risen to an alarming rate. Criminal’s masterminds have changed the way of operations and turn our technology to a bizarre. Securus Technologies have come with the new technology of identifying criminals by voice through calls made. The company provides service that includes public safety, criminal investigations, and monitoring. The company developed a software device that enables an investigator to quickly identify the voice of an inmate or any other party outside the bars and relate the same to where that voice comes from. PRO 4.0 aid the investigator uncover related criminal attacks planned via phone calls. A good number of offenders are easily arrested by just making a follow up on the calls made by just getting a sample of the calls made. This searchable voice enabled the device to make it easy for investigation done without necessarily going through the biometric information of the criminal under investigation. Released inmates might collude with those still in custody carry out criminals activities through phone calls but the PRO 4.0 voice search device has made it convenient to track the involved and arresting thus creating a criminal free environment. Different security authorities have been put in a proper position to deal with criminals activities before they happen. Lives and property have been rescued through this technology. General public have been put on alert to enable them to be secured in case of an attack. Securus Technology keeps on improving to allow it gun down any suspicious criminal plans by inmates and their counterparts who might have been released before or even other criminals who have not set their eyes on police cells. Services of security should be treated with the care and high level of vigilance it deserves.