CLEVELAND (AP) -- Relatives of one of two people killed in a barrage of 137 bullets fired by 13 Cleveland police officers during a chase asked for a federal probe Monday and the mayor appealed for patience as the widening investigation continues.
"He was unarmed and executed by police. Tim didn't deserve to be killed," said Michelle Russell, sister of one of the victims, Timothy Russell, 43.
Family members said firing that many shots was unjustified. Officers say the driver rammed a patrol car and nearly hit an officer and force was necessary.
Earlier, Mayor Frank Jackson said at a city hall news conference that he would support police in the case if procedures were followed, but there will be consequences if they weren't.
The mayor said the key issues in Thursday's chase and gunfire include the number of officers involved and whether proper tactics were used.
The mayor reiterated that the city was reaching out to federal officials for help and recommendations. He asked for patience as the investigation continues.
Spokesman Mike Tobin with the U.S. Attorney's office said there was no comment.
Investigators from the Ohio attorney general's office and the Cuyahoga County sheriff's department joined the investigation. Police in nearby East Cleveland, where the chase ended in gunfire, have been working on the case since it occurred.
No weapon or shell casings were found in the vehicle.
The medical examiner said Monday that the victims were tested for gunpowder residue, which could indicate if they fired a weapon and tossed it. Results on the gunpowder residue tests could take weeks.
The chase began when an officer heard a gunshot near police headquarters in downtown Cleveland. The chase extended more than 5 miles into Bratenahl and East Cleveland.
Information from: The Plain Dealer, http://www.cleveland.com