A blanket rule on data collection isn't tampering with evidence. They are not examining the particular information they are deleting in order to determine whether it is potentially evidence.
> They are not examining the particular information they are deleting in order to determine whether it is potentially evidence.
Of course they are, unless I am misunderstanding what they are doing. It seems that they are specifically deleting location data with regards to visits to abortion clinics. [1]
Their intent is pretty clearly to protect the privacy of women seeking healthcare at facilities that do provide abortions. But they are not peeking at what sort of healthcare the women are seeking. There's a clear distinction.
"Without regard to the purpose of their visit" is going to pass muster pretty much anywhere.
The fact that people are willing to conflate visits to those facilities with seeking abortion is itself a clear justification to discard all data about visits to those facilities!
