answer the question from the articles attached
Read the articles: The Golden State Killer Left a Trail of Horror… https://www.nytimes.com/2018/04/28/us/golden-state-killer-joseph-deangelo.html?rref=collection%2Fbyline%2Ftim-arango The Golden State Killer is Tracked Through a Thicket of DNA… https://www.nytimes.com/2018/04/27/health/dna-privacy-golden-state-killer-genealogy.html And listen to the podcast: The Daily: The Hunt for the Golden State Killer https://www.nytimes.com/2018/05/04/podcasts/the-daily/golden-state-killer-dna.html ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Why did investigators think that perhaps the (then unknown) killer had some law enforcement training, […]