Cipullo and his brother lived there with her and three elderly residents.
Cipullo's brother found the body of their mother, 57-year-old Rebecca Garcia early Thursday morning.
Investigators have been searching for Cipullo since then.
He is said to have a mental disorder. He is being held without bail.
"She was the best lady you can describe," said neighbor Wesley Galaureac. "We never saw her mad. She was a quiet lady. She was born to be a caregiver."
