Dr. Susan Langdon refers to the Welfare Mother Killer as a "mass murderer" instead of a "serial killer." These are two completely different classifications that no profiler would ever confuse.
During the final scenes, when Alex is being led up the steps in the courthouse, we hear the voice of the judge saying "unlawfully, feloniously and after deliberation, caused the death of one hundred thirty people". In the courtroom itself, the judge says "on counts 3 to 133 of first degree murder". This would mean that 131 people died, not 130. To be factually correct, the judge should have said "on counts 3 to 132".
When speaking to Simon in Hebrew, Oren uses the work "DAESH" for the terrorist group but the English subtitles give "ISIS".