Sorry, but you are wrong. No matter what the store sign says, not wearing a mask to go into the store cannot be construed as trespassing. If, as the woman alleges, she has a medical condition that precludes her from wearing a mask, then the Americans with Disabilities Act takes precedence over the store owners desire to discriminate against people not wearing masks. The FEDERAL CIVIL RIGHT not to be discriminated against due to a disability is inviolate.
I know. I have just such a disability to wear a mask. My blood oxygen saturation level is already low, running between 88% to 91%, not in the level where I need to be on daytime oxygen supplement, but do have to have it at night as it can drop to as low as 81%. Wearing a mask makes it drop into the dangerous to my life level. I cannot wear a mask. I do not have to reveal what my disability is due to HIPPA regulations, I just have to assert my disability.
The police officer should have known of this exemption to any such requirement and so should the operators of that store. To not allow it would be the same as preventing persons in wheel chairs, on crutches, or the mentally impaired from entering the store. Many people look healthy, but are not.
I try to avoid entering places were masks are required, but occasionally I have to. Most have been understanding about my problem.
> No matter what the store sign says, not wearing a mask to go into the store cannot be construed as trespassing. <
I must respectfully disagree. Property rights trump all in my book. If an owner wants you trespassed, then you are trespassed. A police officer on his own cannot do that. But a property owner can.
You do make a point with the Americans with Disabilities Act. As a disabled person myself, I am quite sensitive to such issues. But suppose a person might have a very contagious disease. And because of a disability, that person cannot wear a mask. That disability should not exempt the person from a stores safety rules!
Unfortunately, most federal judges would probably disagree with me.