The city of Detroit says it knows who killed stripper Tamara Greene in 2003 but wants to keep that and other information secret while its investigation continues.

A lawyer for the city made those revelations Monday in a motion asking a federal judge to let Detroit file a sealed request to dismiss a lawsuit by Greene’s family.

READ MORE: Ford Adding 450 Jobs To Meet Demand For New Electric Truck

The family has sued the city and ex-Mayor Kwame Kilpatrick over what they say was a deliberately bungled investigation.

Greene has long been rumored to have danced at a party at the mayor’s official residence.

READ MORE: Michigan TV Weatherman Out After Refusing To Get Vaccine

The motion says that to defend itself, the city would have to compromise its investigation by disclosing evidence identifying the killer and an informant.

A Greene family lawyer says the court could seal evidence later.

MORE NEWS: MDOT Update: Ramp Closures On I-94, I-275 As Part Of Rebuilding I-275 Project

(Copyright 2010 by The Associated Press. All Rights Reserved.)