Grant 's mother , Wanda Johnson , had asked the judge to sentence Mehserle to the maximum 14 years in prison . Johannes Mehserle walks out of prison one year . The former Oscar Grant 's officer was convicted of involuntary manslaughter in BART death . Johannes Mehserle served two-year of a two-year sentence because of credit for good conduct .
Johannes Mehserle walks out of prison one year . The former Oscar Grant 's officer was convicted of involuntary manslaughter in BART death . Johannes Mehserle served two-year of a two-year sentence because of credit for good conduct .