David Berkowitz

• http://history1900s.about.com/od/timelines/tp/1970timeline.htm

• http://community.fortunecity.ws/roswell/streiber/273/berkowitz_cf.htm

• http://crime.about.com/od/murder/p/sonofsam.htm

• http://www.biography.com/#!/people/david-berkowitz-9209372#synopsis

• http://crime.about.com/od/murder/p/sonofsam.htm

• http://altereddimensions.net/2012/son-of-sam-david-berkowitz

• http://www.chacha.com/question/david-berkowitz-evidence

• http://www.encyclopedia.com/doc/1G2-3498200262.html

• http://www.criminalmotives.com/serial-killers/serial-killers/david-berkowitz/#Psychological_profile_and_other_police_investigations