I have a few problems:

- 23AndMe/Ancestry shouldn't have a database of DNA -> identity mappings.

- Law enforcement shouldn't have the ability to compel surrender of data for which someone can have a reasonable expectation of privacy (medical records, private communications, journals etc.). Privacy trumps investigation for me.

- Law enforcement shouldn't have any kind of "search" access to any private DNA database. I could accept them getting information for an exact match but including relatives and partial matches is too far.