Two Joshua Tree residents were arrested after the robbery of a pizza delivery person. Sheriff’s Sergeant Rick Millard said Wednesday evening at 4:40, Arthur Garrido, 29, ordered pizza to be delivered to his residence in the 7400 block of Sherwood in Joshua Tree. When the pizza was delivered, Garrido argued with the driver over the amount of change he was given. Garrido then threatened the driver and robbed him of the pizza and an undisclosed amount of money. Deputies developed evidence that identified Garrido and Elizabeth Silva, 29, as suspects. After an exhaustive, ongoing investigation, deputies contacted and arrested Garrido and Silva yesterday for investigation of strong-arm robbery. They were transported to the Morongo Jail where Arthur Garrido was booked for investigation of strong-arm robbery. Elizabeth Silva was booked for accessory to robbery and possession of stolen property. Silva was also booked on a probation violation. Both Garrido and Silva are both being held on $100,000 bail each.