Criminal Psychology of a Murderer

As an example: The Jodi Arias case on murder concluded she killed Travis Alexander. She was criticized for her memory lossage; as well as other things.
These are the psychological elements that would have been present if she were guilty:
[1] Stimuli: Something would have caused Jodi to commit a barbarous crime . She would not do that just to perform a crime. Here are some stimuli:
   [1] Abuse: Extreme abuse without escape causes;
      [1] A very inefficient methodology of naivity and negligence; as well as ignorance.
      [2] A being pressured into undesirable actions that cause extreme resistivity; and, retaliation.
      [3] A methodology to utilize extreme methods to terminate a great threat to herself.
   [2] Entrapment that is inescapable
   [3] Excessive misery caused by  entrapment and abuse.
In many cases, she would not have remembered some things due to not wanting to remember excessively traumatic situations. That is a natural defense to prevent further misery.