Ralph Armstrong, whose convictions for the 1980 rape and murder of a UW-Madison student were overturned, filed a $58 million federal civil rights lawsuit against the state of Wisconsin on Friday seeking compensation for about 30 years behind bars for the convictions. Armstrong filed the lawsuit by mail from his prison cell in New Mexico, where he is serving a sentence for a parole violation for earlier criminal convictions in that state in the 1970s.