Sources, who would only speak on the condition of anonymity, told Eyewitness News on Monday the guard had been in the process of performing a cell check at the Canaan federal penitentiary. They say Williams had confiscated something from the inmate's cell, allegedly sparking the attack that claimed the 34-year-old's life.
Sources said a second corrections officer had accompanied Williams to the cell check.
Representatives for the U.S. Attorney for the Middle District of Pennsylvania have repeatedly denied requests for information on the case. Sources say the inmate who attacked Williams was transferred to another maximum security prison in Pennsylvania.
Williams was pronounced dead just after 11:30 the night of Feb. 25. The coroner listed his death a homicide.
Sources are critical of the perceived delay in releasing information concerning the investigation of the homicide. They have argued the suspect has since been identified internally.
In an email sent Wednesday to Heidi Havens, a spokeswoman for the U.S. Attorney, Eyewitness News sought information on where the homicide investigation stood. A staff member replied a day later the office would have no comment.
Williams was laid to rest on Saturday.