The Manhattan district attorney’s office said that they are investigating the shooting death of a mentally disturbed man in the Morningside Heights neighborhood in Manhattan.

Last week, cops were called to Mohamed Bah’s apartment on Morningside Avenue by his 56-year-old mother, Hawa Bah, who said her son wasn’t “feeling good” and that she wanted to take him to the hospital. She had flown into the city from Guinea after she became concerned over his “irrational” attitude during their phone conversations.

Cops said that Mohamed Bah, who was naked, barricaded himself in the apartment despite police demands to open the door. He then emerged with a 13-inch knife as cops screamed for him to drop the weapon. According to the police, he refused and was then Tasered twice and hit with rubber bullets. When Bah continued toward the police, he was shot. He was eventually pronounced dead at St. Luke’s Hospital.

Bah would’ve celebrated his 29th birthday this past Friday. He was a cab driver who had recently stopped taking marketing classes at the Borough of Manhattan Community College.

When the AmNews reached out to the NYPD for comment, they didn’t talk about the ongoing investigation, but they did discuss how an individual can continue movements after a Taser is used.

“Response to Tasers differs from individual to individual. Also, a Taser may not be effective if a full circuit isn’t completed, as when one and not both darts strike the subject,” said NYPD Deputy Commissioner Paul Browne. “Before deadly force was employed in the most recent instance, a Taser fired the first time had no effect, then a large rubber bullet was fired to no effect, and a Taser was fired a second time to no effect. “

Bah’s mother and other family members believe that the shooting wasn’t justified and some other form of action could’ve been taken that wouldn’t have resulted in death. According to the family, Bah was depressed. A grand jury is expected to hear the case in the next several months.