A Waterloo man has been sentenced to life behind bars for what prosecutors described as a revenge killing. Judge Linda Fangman ordered 22-year-old Raymond Birden Jr. to life in prison for the 2018 death of 22-year-old Shavondes Martin. Martin was acquitted earlier that year of killing Birden’s brother in 2016. Martin had been one of three people charged with the 2016 drive-by shooting of Birden’s brother, Otavious Brown. Prosecutors say Birden searched for Martin on May 31, 2018. Martin was found hours later shot to death in a Waterloo alley.