IOWA CITY — Two black men wrongly convicted in the 1977 murder of a white Iowa police officer hope to prove something they could not during trials that sent them to prison for 25 years: that detectives framed them to solve a high-profile case.

During a civil trial that starts Wednesday in Des Moines, Terry Harrington and Curtis McGhee will argue that Council Bluffs police officers coerced witnesses into fabricating testimony against them in the killing of John Schweer.