This week on Headline Highlights: Rebecca Haro pleaded guilty in the death of her 7-month-old son Emmanuel and was sentenced to more than 12 years in prison, though his remains have never been found. Nearly a year after Melissa Casias disappeared, hikers found her remains in a remote area of Carson National Forest. New court filings reveal disturbing new evidence in the cruise ship murder of 18-year-old Anna Kepner, as prosecutors build their case against her stepbrother, Timothy Hudson. Three women were found dead in Puerto Vallarta in two weeks, sparking serial killer rumors. And new interviews, phone calls, and legal filings in the Mackenzie Shirilla case have reignited debate over her conviction…