Domestic Violence "Murder/Suicide"

One of the worst things you can hear on the news is when a member of a family kills someone and also kills themselves. What was going on in that person's mind?  Why did they feel this was their last resort?  What were the red flags of this relationship that people saw or did not see?  How does this type of tragedy effect the family members who are left.  We are going to talk with Ms. Sheila Lowe who lost her daughter to murder/suicide by her federal agent boyfriend.