This story was updated at 12 p.m. ET on Thursday.

The City of Cleveland came under fire on Wednesday over a claim filed against the estate of Tamir Rice, the 12-year-old boy who was shot and killed by a police officer in 2014, that asks for for $500 to cover "ambulance advance life support" and other medical expenses, including mileage, related to Rice's ride to the hospital the day he was shot.

See also: Protests in Cleveland after officers avoid charges in Tamir Rice shooting

"The Rice family is disturbed by the city's behavior," Subodh Chandra, an attorney representing members of Rice's family in their ongoing civil suit against the city, said in a statement emailed to Mashable. "The callousness, insensitivity, and poor judgment required for the city to send a bill after its own police officers killed 12-year-old Tamir is breathtaking. This adds insult to homicide. Ms. Rice considers this harassment," the lawyer said.

Mashable has also reached out to the attorneys listed on the claim and representatives of the City of Cleveland for further comment about the claim, which caused outrage in the local community and was criticized by Democratic presidential candidate Hillary Clinton on Twitter.

The creditor's claim, which demanded payment "for emergency medical services rendered as the decedent’s last dying expense under Ohio Revised Code §2117.25(A)(5)," can be viewed below.

On Thursday, Cleveland Mayor Frank Jackson apologized for the "mistake," saying it should never have happened.

He added that the city would review the bill to see if any city employees were negligent in sending it before considering how they would be disciplined, if at all.

The claim came less than two months after the two Cleveland Police officers involved in Rice's shooting death were cleared of any charges in connection with the boy's death.

In November 2015, a report commissioned by the Cuyahoga County prosecutor's office called Rice's death tragic but the result of a "reasonable" use of force by police.

Video of the incident shows that Rice, who was black, was fatally shot by a white Cleveland officer named Timothy Loehmann on Nov. 22, 2014, seconds after Loehmann stepped out of his police car.

Rice had been playing with a toy gun at a park and a fellow park visitor had reported it by calling 911. The caller said that Rice's gun might have been fake and that the boy was likely a juvenile, but the dispatcher didn't relay that information to Loehmann and the other officer.

Loehmann said he warned Rice to put the toy down and that Rice "left me no choice," but, as the video shows, he shot Rice almost immediately after exiting the vehicle.

After the shooting, neither Loehmann or his fellow officer, Frank Garmback, administered first aid to Rice, who laid on the ground unattended until more law enforcement arrived, several minutes later. He died in a hospital the next day.

A sign at a protest on November 22, 2015, marking the one-year anniversary of Tamir Rice's death. Image: Andy Katz / Pacific Press/Associated Press

Cleveland has been caught in a firestorm of criticism surrounding its police force in recent years, as detailed in a Justice Department report of police abuse that was released just two weeks after Rice's shooting.

Just last month, six police officers were fired over a deadly 2012 police chase that concluded with police killing two unarmed suspects in a hail of gunfire.