The utilization of Genealogy sites for DNA matches in murder cases

The utilization of Genealogy sites for DNA matches in murder cases has been in the headlines for some time, but is it ethical and/or the right way to do it? Read the below news piece from Buzzfeed li

The utilization of Genealogy sites for DNA matches in murder cases has been in the headlines for some time, but is it ethical and/or the right way to do it?  Read the below news piece from Buzzfeed listed in the below URL and provide your opinion.  Be sure to use other references.

Go to:  https://www.buzzfeednews.com/article/peteraldhous/hackers-gedmatch-dna-privacy

do two answers for this work.  explaining your opinion, with 150 words minimum.