shall conduct a full reinvestigation of the cold case murder at issue if the review of the case file required by section 2 concludes that a full reinvestigation of such cold case murder would result in probative investigative leads. (b) Reinvestigation A full reinvestigation shall include analyzing all evidence regarding the cold case murder at issue for the purpose of developing probative investigative leads as to the perpetrator. (c) Reviewer The person or persons doing the full reinvestigation required by subsection (a) shall not have previously investigated the murder at issue, except for the case file review pursuant to section 2. (d) Prohibition on Multiple Concurrent Reviews Only one full reinvestigation shall be undertaken at any one time with respect to the same cold case murder victim. 6. Consultation and updates (a) In general The applicable agency shall consult with the designated person who filed the written application pursuant to section 2 and provide him or her with periodic updates during the case file review and full reinvestigation. (b) Explanation of Conclusion The applicable agency shall explain to the designated person who filed the written application pursuant to section 2 its decision whether or not to engage in the full reinvestigation provided for under section 5 at the conclusion of the case file review. 7. Subsequent reviews (a) Case file review If a case file review is done and a conclusion is reached not to conduct a full reinvestigation, no additional case file review shall be undertaken for a period of five years. (b) Full Reinvestigation If a full reinvestigation is done and a suspect is not identified at its conclusion, no additional case file review or full reinvestigation shall be undertaken for a period of five years. 8. Data collection (a) In general Beginning three years after enactment of this Act, the National Institute of Justice shall publish annually statistics on the number of cold cases. (b) Manner of Publication The statistics published pursuant to subsection (a)