Shreveport police have arrested one man and they're looking for another in connection with last Friday afternoon's beating and robbery of another man.  Investigators say two suspects approached the victim in the 3700 block of Sumner Street and beat him with a shovel.  Then they took his cash, wallet, and cell phone.  Police have been able to identify 19-year-old Trivion Thomas as one suspect in the case.  He's been arrested and booked into the Shreveport City Jail on one count of second-degree robbery and one count of possessing marijuana.  They're still looking for the second suspect.