She was a good cop who was given no back-up that day. She was there to help the Ramseys in a traumatic situation and John treated her like she was invisible and ignorant.
Her forté was working with female and child victims of violent crime, for which the department had awarded her.
When all the bad breaks happened because of the Ramsey crime, she was made a scapegoat by the whole department and blamed for foul-ups that weren't her fault. She wasn't even given the handbook for the very rare crime of kidnapping for ransom. None of the other cops or her boss or anyone helped her.
It was a very unfortunate situation. The perp of this crime got some incredibly lucky breaks and they started with the very first patrol cop who answered the call that morning, long before Arndt got there.
Important FR mail sent
I thought it was a little odd to leave one detective at a house when no one is really sure WHAT is going on...