This afternoon Rodrick Taylor, 34, of Dorchester was arrested for the April 30 homicide of 19-year-old Dominique Samuels. Members of the Boston Police Homicide Unit, Suffolk County District Attorney’s Office, Detectives from District 2 and members of the Youth Violence Strike Force arrested Taylor based on significant and credible evidence during this intensive two-week long investigation.Taylor will be arraigned on Monday morning in the Roxbury Division of the Boston Municipal Court.