CRANSTON, R.I. — A woman who cared for her 21-year-old autistic daughter around the clock is now charged with killing her and attempting to harm herself in July.

Anna Maria Angelosanto, 62, was charged Friday with first-degree murder of her daughter, Alexandra Straccia, after an investigation into the young woman’s death on July 27.

The landlord of their apartment at 50 Kingwood Ave. called the Cranston police that morning over a water emergency at their residence. The police found Angelosanto suffering from apparent self-inflicted injuries. First responders provided medical aid at the scene, police said at the time.

While officers were conducting a sweep of the residence, they discovered the injured woman’s 21-year-old daughter dead in a separate bedroom, police said.

Angelosanto was taken to Rhode Island Hospital for treatment, and the Cranston police detectives launched an investigation and conducted searches. They found a handwritten note and prescriptions for medication, as well as over-the-counter medications. The detectives also interviewed relatives and Angelosanto while she was hospitalized.

They learned that Straccia had severe autism and was entirely dependent upon her mother for around-the-clock care.

Police Chief Col. Michael Winquist said in a statement Friday that the detectives developed probable cause to believe that Angelosanto intentionally caused the death of her daughter before attempting to take her own life. After consulting with the attorney general’s office, the detectives obtained a warrant charging Angelosanto with domestic violence, first-degree murder.

“This is an extraordinarily tragic case that has deeply affected our community and everyone involved in the investigation,” Winquist said. “Our detectives conducted a thorough, professional, and compassionate investigation under extremely difficult circumstances. We extend our deepest condolences to Alexandra’s family and loved ones as they continue to cope with this devastating loss.”

Mayor Kenneth J. Hopkins said the incident was “a heartbreaking tragedy.”

“Our thoughts are with Alexandra’s family, her loved ones, and all those affected by this loss,” said Hopkins. “This case is a painful reminder of the tremendous challenges families and caregivers can face, and the importance of reaching out for help when someone is struggling.”

Angelosanto was taken into custody when she was released from the hospital on Friday. She was arraigned at Cranston Police Department Headquarters before a justice of the peace, ordered held without bail, and transported to the Adult Correctional Institution Women’s Intake Facility.

This is the sixth incident of domestic violence homicide in Rhode Island this year.

Anyone experiencing emotional distress or who is concerned about someone else can contact the 988 Suicide & Crisis Lifeline by calling or texting 988. Online chat is also available at 988lifeline.org.

Amanda Milkovits can be reached at amanda.milkovits@globe.com. Follow her @AmandaMilkovits.

Sackie Makor, 37, was pulled over and arrested shortly before 11 p.m. Wednesday on Route 138 in North Kingstown, the Rhode Island State Police said in a media release.

Makor was charged with driving under the influence of liquor and refusing to submit to a chemical test, the release said.