I wondered the same thing about the glucose level. According to one of Terri's caregivers, MRS allegedly played with her glucose levels when she was at the hospice and a discarded insulin syringe was found in the trash in her room.
I think Terri was a Sabal Palms Nursing Home when the alleged insulin tampering occurred. That was in Nurse Carla's Affidavit. She was fired for calling in a police report of the incident.