A 57-year-old man admitted killing Judge Lefkow's husband and mother in a letter to a Chicago television station and in a suicide note in his van.  Bart A. Ross, who committed suicide on March 9 after he was stopped for a routine traffic violation in West Allis, Wisconsin, said that he killed Lefkow's relatives because of the judge's ruling against him.  Authorities said that the DNA found on a cigarette butt at the scene of the murders matches that of Ross. The .22-caliber shells investigators found in Ross' s van also matches the casings found in Judge Lefkow's home.