NEW YORK — With outrage still simmering over the police killing last month of an unarmed black man on his wedding day, the police department came under fresh scrutiny yesterday over an arrest of a so-called witness, its undercover tactics and two new shootings.Larenzo Kinred, identified by his lawyer as a witness in the fatal shooting of Sean Bell on November 25, was arrested for disorderly conduct Wednesday, police said. Kinred earlier had attended a downtown rally where hundreds of demonstrators protested Bell’s shooting, said the lawyer, Charlie King.

The circumstances of the arrest were unclear, but King said police officials initially denied his 32-year-old client was in custody.

“This is the latest example of accounts that have come to me of police misconduct,” King said at a news conference.

The shooting and investigation have generated widespread outrage, especially among black New Yorkers. The victims were black; two of the officers were black, two were white and one was Hispanic.

King says he represents five men who witnessed the killing of Bell and the wounding of two of his friends inside their car after a bachelor party at a strip club where officers were conducting an undercover vice operation.

The five officers who fired a total of 50 rounds have been put on paid administrative leave pending the outcome of a grand jury investigation.

Community activists have accused police of conducting a campaign of intimidation — including raiding homes and making arrests on trumped-up charges — amid a search for new evidence to explain what happened before the shootings.

Police Commissioner Raymond Kelly insisted yesterday that investigators had handled the case professionally. Kinred’s arrest was coincidental, he said.

Kelly also rejected renewed calls by a fraternal organisation, 100 Blacks in Law Enforcement Who Care, to suspend all undercover vice operations until reforms are in place.

Yesterday, police were investigating two separate shootings this week by officers — the first since Bell’s death. Both involved armed suspects, police said.

One was during the arrest of four robbery suspects when police said one suspect, Hasani Omari, pulled a gun while trying to run away.

Omari was in stable condition with a gunshot wound to the upper thigh, police said.

In the second shooting, uniformed officers exchanged gunfire with an unidentified man after he fired several rounds at a car, police said. The man was found later hiding in an apartment building with a bandaged arm.