FREEHOLD — On Aug. 28, 2012, Toms River resident Michelle Heale was trusted to babysit 14-month-old Mason Hess, as she did a few times a week. Today, jury selection is expected to begin in the trial to determine if Heale murdered Mason Hess through “vigorous and sustained shaking.” Heale called 9-1-1 at approximately 2 p.m. on…