If your elderly parent is intentionally is olated from his family by his friend By moving him to her house, blocking all access to him. Is it abuse?

For about two year woman has been exploiting my father. Recently she persuaded him to move out of assisted living facility to an apartment without services. Now she has persuaded him to move to her house and will not let us in to see him or call him. We have contacted the Elderly Protective Services when he first moved into the apartment? We provided food and meals on wheels. We contracted for a home health aide to start on the 16th of April. She persuaded him to move in with her on the 14th of April. He has diabetes, macular degeneration, short term memory loss, mood swings and prone to falls. He has cardiac issues after a heart attack in May 31 2020.