Elected officials are calling for an independent investigation into the shooting death of Shem Walker, who was killed July 11 by an undercover police officer outside of his mother's home on Lafayette Avenue in Clinton Hill.

The deadly incident, the second in recent months involving a police officer, has also spawned calls for reform of the Civilian Complaint Review Board (CCRB) to ensure a higher standard of accountability in the city's response to police shootings.

"This tragedy has left a deep wound in our community, and shaken our faith in the ability of the NYPD as an institution to treat us fairly," Assemblyman Hakeem Jeffries said at a news conference following the shooting. "We demand a comprehensive and impartial investigation so that justice can prevail."

Councilman Bill de Blasio, who is running for public advocate, proposed reforming the CCRB so it can properly regulate the Police Department and give communities a stronger government ally.

"The Civilian Complaint Review Board must be reformed so that communities have a voice when the worst happens," de Blasio said.

Walker was visiting his mother at her home in Clinton Hill on Saturday, July 11, when he stepped outside for a cigarette, according to reports of the shooting.

He found a man sitting on the stairs of the building and reportedly asked him to leave. A struggle between the two then ensued.

The stranger, an undercover narcotics officer, wrestled Walker to the ground before shooting him in the head and chest. Walker was rushed to Brooklyn Hospital Center, where he was pronounced dead on arrival.

A funeral for Walker was held Monday, July 20, two days after his family addressed the incident for the first time publicly at a rally in Harlem organized by the Reverend Al Sharpton.

Councilwoman Letitia James said a full investigation of the shooting is needed, "because we have to know what happened and make sure any responsible parties are held accountable."