HARTFORD, Conn. (AP) — The Latest on a public hearing about abuse at Connecticut's maximum-security hospital (all times local):

3:35 p.m.

A brother of the patient allegedly abused at Connecticut's only maximum security psychiatric prison is coming forward publicly for the first time, urging legislators to continue investigating what happened at the state-run Middletown facility.

Al Shehadi told members of the General Assembly's Public Health Committee on Monday that the abuse his brother has suffered "is hard to imagine." He describes video of workers flipping Bill Shehadi off a bed, pouring liquid over his head and mopping his head with a floor mop. Over 24 days, Al Shehadi says there were roughly 50 incidents of abuse.

Al Shehadi says he felt the need to let the public know his brother's name and his story.

Bill Shehadi, who suffers from severe psychological problems, killed their father more than 20 years ago.

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11:30 a.m.

State officials are expressing surprise at the extent of alleged abuse that took place at Connecticut's only maximum-security psychiatric hospital.

Department of Mental Health and Addiction Services Commissioner Miriam Dephin-Rittmon told state lawmakers Monday that top officials "never had information that would suggest a pattern this significant."

Thirty-seven employees at Whiting Forensic Division of the Connecticut Valley Hospital in Middletown have been implicated in the alleged abuse of a patient. Seven have been fired and 10 have been arrested.

Dephin-Rittmon says fear and intimidation helped to cover up the alleged abuse, which she says "has sickened me and haunted me" ever since she saw the video evidence.

She says her agency is "working very hard to understand how this could happen," noting it's "not reflective of our whole system."