A voice sample of the accused was recorded at TGFSL, and three call recordings from the mobile phone were examined. The call recordings were suspected to be conversations between the accused and his mother regarding the motive behind the murder. According to the case history, the accused had previously killed his first wife. Upon examination, the call recordings were found to be continuous with no editing. It was also determined that the male voice in the call recording and the voice sample recorded at TGFSL belonged to the same person.