SALEM, Ore.—A driver crashed their car into a homeless encampment in Salem, Oregon, early Sunday morning, killing four people and injuring three more, including the driver, authorities said. Police arrested Enrique Rodriguez Jr., 24, on Sunday evening. Rodriguez was charged with four counts of first-degree manslaughter, second and third-degree assault, and six counts of reckless endangerment. In a statement, authorities said the Salem Police Traffic Team believes “alcohol may have been a contributing factor” in the crash. It wasn’t immediately clear whether Rodriguez had retained an attorney. Nathan Rose tells the Salem Statesman Journal that he and his girlfriend were in their tent when they heard two loud thuds. The car just missed their tent, Rose said. Rose said he saw some of his friends pinned under the car and called 911. He said he helped pull one person from under the car but witnesses were unable to help the …