San Jose police arrested 49ers outside linebacker Aldon Smith on suspicion of crashing his black pickup truck into a tree early Friday morning as he was allegedly driving while under the influence of alcohol. Jail officials also said that he was booked in connection with possessing an unknown amount of marijuana.Matt Maiocco of CSN Bay Area first reported the news.Police Sgt. Heather Randol told NBC Bay Area that the 23-year-old Smith was "over the limit," but she did not specify by how much. She also said Smith, who was in the pickup by himself, was not injured and was "cooperative."In fact, Smith was on the field at the 49ers' practice facility in Santa Clara Friday afternoon, Maiocco reported."I expect Aldon to be back at work and play on Sunday," 49ers head coach Jim Harbaugh said at the team's previously scheduled press conference Friday afternoon.RAW VIDEO: San Jose Police Describe Arrest A neighbor called police to report the accident about 7 a.m. in the 2500 block of Bentley Ridge Drive, where homes are in the $1-million-or-more range. Randol said she didn't know where Smith was heading from or going to. NBC Bay Area learned that fellow 49er Ray...