A drunk driver who killed a man when he pulled into the path of his motorcycle on Smithville Highway last year will serve eight years in prison for vehicular homicide.The drunk driver, Luis A. Martinez, 30, has entered a guilty plea before Circuit Court Judge Bart Stanley to charges of vehicular homicide, failure to render aid, and leaving the scene of an accident with a fatality. He was given an eight-year sentence and must pay $3,000 plus court costs.The crash, which occurred in October 2010, killed motorcycle rider Michael Guess, 34, who left behind a wife and two children.During sentencing, Guess’ mother, Inez Guess, speaking briefly before the court, tearfully questioned why Martinez would leave her son to die on the pavement after the wreck.“Why did you go off and leave him?” Ms. Guess said addressing Martinez after his guilty plea.