Forensic psychologist Kirk Heilbrun retook the witness stand Tuesday, testifying Lindsay Clancy had a "moral awareness" about the "wrongfulness" of killing her children. NBC News legal analyst Misty Marris explains why this line of questioning is important for the prosecution's case.
Source: [NBC News](https://www.nbcnews.com/now/video/forensic-psychologist-testifies-lindsay-clancy-is-criminally-responsible-for-children-s-deaths-268837957717)