The department had been investigating the cases for six months.
She also said the department would investigate more deaths of residents.
But the department will investigate a specific complaint called in to (718) 694-2540.
He said the department investigates any time force is used inside the jail.
In its first sixth month, the new department investigated 451 complaints.
If a complaint were filed, he said, his department would investigate the matter.
She also said the department was investigating, "whether, in fact, there have been" such violations.
A police spokesperson said that the department is investigating two officers.
"It didn't happen," he said, adding that the department was still investigating the store.
Commissioner Ward said the department would investigate the entire incident.