Slain Black man's family vows legal fight against policeAn attorney for the family of a Black teen killed by a suburban Milwaukee police officer vowed Thursday to keep fighting and working to prove racism pervades the officer’s department, after a prosecutor declined to file charges in the case. Attorney Kimberley Motley said she plans to file a federal lawsuit against Wauwatosa Police Officer Joseph Mensah in 17-year-old Alvin Cole’s death. Motley sued in state court on Tuesday seeking department documents that she believes will show Mensah’s supervisors are racist and that officers have racially profiled Black drivers for years.