It would be interesting for the FBI to profile him. Breaking of the neck with no mention of a sexual component seems to me to be a fairly rage driven, advanced technique for killing someone and doesn’t really fit the typical profile of a serial killer. This one wanted his hands on her to kill her quickly it seems vs. the serial killer where torture and sexual abuse usually occurs.
From a profiling text book...
“Serial killers enjoy extending the suffering of their victims. They get a lot of power by determining whether their victim will live or die. They may torture their victim for several days to obtain as much pleasaure as possible.”
“A majority of serial killers have a history of sexual and physical abuse during childhood. In half of the serial killers families, the biological father had left before the child was 12 years old and the child was raised by a domineering mother. In the cases where the father didn’t leave, he was domineering and abusive. Many serial killers were bed wetters beyond the age of 12. Delinquent acts such as pyromania, theft, and cruelty to animals were present in the childhoods of most serial killers.”