I don't think it's a slam dunk Garland will indict him. It would be a big, controversial step to indict a former prez for an AG striving not to politicize the DoJ as his predecessor did. But obviously there is ample evidence to do so.
Boy did we dodge a bullet not having the sleazy Garland in SCOTUS. Thank you Mitch McConnell! Not something I say to Mitch often, but he earned it on this one