Izvori:
Serial Napper podcast
https://www.cbsnews.com/detroit/news/dearborn-heights-man-accused-of-killing-kids-torturing-wife-to-undergo-psychiatric-exam/
https://www.reuters.com/article/world/michigan-man-charged-with-killing-4-children-murdered-previous-wife-idUSKCN11S28Z/
https://www.fox13news.com/news/man-accused-of-killing-family-killed-pregnant-wife-in-1991
https://murderpedia.org/male.G/g/green-gregory.htm#google_vignette