The senators also heard from Harra Kazuo, whose husband, Jaypee Bertes, and his father, Renato Bertes, were killed by the officers inside the Pasay City police station after they were arrested.

She told the committee that the police had been extorting money from her husband, a small-time drug peddler. She said he had been preparing to surrender to the police because he was afraid he would be killed. About 600,000 people suspected of being drug dealers or users have turned themselves in to escape being killed since the antidrug campaign began, the authorities have said.

Wearing large sunglasses and partly covering her face with a shawl, Ms. Kazuo told the senators that the police had beaten her husband and threatened to shoot him if he did not hand over his drugs, but that he had nothing to give them. The police strip-searched their 2-year-old daughter looking for drugs, she said. Renato Bertes arrived in the middle of the commotion, and the police beat him for insisting they show him a warrant, she said.

“If you want, we can shoot you all here,” Ms. Kazuo said one officer told them.

At the station, the police severely beat the two men, breaking her husband’s arm, according to a forensic report. The police said the two had tried to grab their guns and escape. Each man was shot three times.