CLAYTON, Mo. (AP) — Michael Brown’s parents have filed a wrongful-death lawsuit against the city of Ferguson over the fatal shooting of their son by a white police officer.

Attorneys promise the case will bring to light new forensic evidence and raise doubts about the police version of events.

They say the lawsuit will include evidence that was ignored by the grand jury and the Justice Department, including bullets allegedly fired by officer Darren Wilson found in buildings. They say some of that evidence has been overlooked in previous investigations.

Brown was 18 and unarmed when Wilson shot him during a confrontation last summer.

The shooting led to sometimes-violent demonstrations and spawned a national protest movement. In the end, local and federal authorities ruled that the shooting was justified.