I love the show People Magazine Investigates on the Investigation Discovery channel, and the case that aired this week is a difficult one because a 2-year-old child was involved. There are so many unanswered questions about the case and finger pointing that it makes coming up with theories difficult, especially because you want to be sensitive to the parents who are still looking for answers. On the other hand, there are far too many cases like Susan Smith and Casey Anthony (even though she was acquitted of charges) that prove a parent can indeed know something happened to their child and then lie to investigators about it. Here is what we know. On…