The family of a Black man killed when Philadelphia police officers fired a dozen rounds in a shooting caught on video had called for an ambulance to get him help with a mental health crisis, not for police intervention, their lawyer said Tuesday. Additionally, Walter Wallace’s wife is pregnant and is scheduled to have labor induced in coming days, the lawyer, Shaka Johnson, told reporters from the steps of a family home. Wallace’s father planned a statement later Tuesday, Johnson said. Philadelphia officials anticipated a second night of unrest Tuesday, and a Pennsylvania National Guard spokesperson told The Inquirer that several hundred guardsmen were expected to arrive in the city within 24 to 48 hours.

Chief Police Inspector Frank Vanore said earlier at a news conference that police had received a call Monday about a man screaming and that he was armed with a knife.  The two officers each fired at least seven rounds — at least 14 total shots — but could not say how many times Wallace, 27, was struck. Wallace’s father, Walter Wallace Sr., earlier told The Philadelphia Inquirer that his son was on medication and struggled with his mental health. "Why didn’t they use a Taser?” he asked.

The officers had not been interviewed as of Tuesday afternoon, Police Commissioner Danielle Outlaw said. She said the officers’ names and other identifying information, including their race, would be withheld per department policy until the department could be sure releasing the information would not pose a threat to their safety. Neither officer had a Taser or similar device, with Outlaw saying the department has previously asked for funding to equip more officers with those devices.

Wallace was shot before 4 p.m. Monday in an episode filmed by a bystander and posted on social media. Witnesses complained that police fired excessive shots. Police arrested at least 91 people during unrest Monday night and Tuesday morning, with three people cited for failing to disperse and about a dozen charged with assault of an officer. Police had previously said 30 officers were injured in the unrest, most of them hit with thrown objects like bricks. One officer was still hospitalized Tuesday with a broken leg after being purposely run over by a pickup truck, police said.

Wallace advanced toward the officers, who fired several times, said Officer Tanya Little, a police spokesperson. In the video, a woman and at least one man follow Wallace, trying to get him to listen to officers, as he briskly walks across the street and between cars. The woman, identified by family members as Wallace’s mother, screams and throws something at an officer after her son is shot and falls to the ground.