Do the brains of serial killers work differently from others

I need the second chapter for this essay and it to be read over as a whole and fixed with the checklist i have given in theattachments. The second chapter should be from the biological point of veiw. But please dont write it so complex that it is hard for a person whos not good in bio to read and understand.
only use the sources in the file. Two long direct citiciations need to be ( 40 – 100 words) and 2 short ones ( not longer than 40 words)
Check the file named The paper that is the draft i do have now!