The family of a Brooklyn man shot and killed by an off-duty police officer is demanding justice.

Delrawn Small was killed by NYPD Officer Wayne Isaacs during a road-rage altercation last July 4 in Cypress Hills. Small was the father of three children.

The New York state attorney general charged Isaacs with second-degree murder in the killing last September.

Small's family gathered outside Brooklyn Supreme Court after a pretrial hearing for Isaacs. Family members say they are heartbroken by their loss.

"There is no reason for Wayne Isaacs to shoot and kill my brother at all," says Victor Dempsey, Small's brother.

During the hearing, Isaacs' attorneys said their client was assaulted by Small, and that Isaacs followed the rules and acted professionally.

Small's family says there was nothing professional about fatally shooting the unarmed man.

Isaacs is due back in court in September.