wow! where to begin?
1. the police were pretty useless, missed important clues over and over
2. mental illness change a person's life path, but who to blame and who's failure that shaped sociopaths like this? They were evil but at the same time they were also victims from mental health.
3. smart people always want to prove they are smarter than others and they desire the confirmation/recognition from others
4. if Wells were truly an innocent victim, his death probably caused by that prostitute who nominated him to do this job due to her addiction, but again, his fate was to meet her