It seems like DNR's put a huge burden on caregivers, EMT, police. fire department, 911 etc.
Their mission is to render aid and save lives.

I feel sad about that happening to your mother. My hope is that the fireman receives better training.

I was told by my Mother’s nurse that if 911 is called you are giving permission to resuscitate, so the EMT was doing his job. Her advice for my Mother was to wait an hour before calling anyone if she stopped breathing.