Ok, call me a pessimist, but I think this is a ploy. I do hope it opens up the investigation, but if Jonah really wanted to help he'd ask them to make everything public like the search warrant and call for full cooperation with the Zahau family experts and full transparency - THAT is what he should be doing, not requesting for an evaluation of procedures and such which may show nothing.
Jonah should be requesting specific things we did not see such as full crime scene recreations, reanalysis of all evidence and a report on what was and wasn't investigated, advanced analyses on evidence (such as Rebecca's phone), and divulging any other pertinent information. Doing so, would tell me he is, in fact, interested in justice for Rebecca and honoring her family's concerns. He's not.