An investigation that's been going on since March has led to the arrests of three suspects in connection with the theft of gasoline -- thousands of gallons worth -- from the Calumet refinery.Those arrested have been identified as 29-year-old Jacob Morrow -- an employee of Calumet, 29-year-old Amir Khurram -- the owner of the Chevron station in the 74-hundred block of Mansfield Road, and 28-year-old Kevin Harris. All three are charged with felony theft. Detectives say more arrests could be forthcoming.