STOCKTON — A man has been arrested in connection with a Nov. 2 homicide, and Stockton Police Department investigators still are looking for a second person who may have been involved.Detectives received a Stockton Crime Stoppers tip on Tuesday and were able to arrest 24-year-old Santana Sanchez on suspicion of murder.Sanchez is being held without bail at the San Joaquin County Jail and is scheduled to appear in court at 1:30 p.m.