(Portland, OR)  --  The driver wanted for a hit-and-run and a multiple-vehicle crash in downtown Portland is now in custody.  Authorities say the man crashed into a motorcycle yesterday morning on Southwest 3rd Avenue and Madison Street.  A few minutes later, the man is accused of hitting an SUV head-on and crashing into two other vehicles at Southwest Barbur Boulevard and Hamilton Street.  Drugs or alcohol haven't been ruled out as a factor in the man's actions.