Hi Katherine,
    The pain distribution you describe is mediated by the ilioinguinal and {genito}femoral nerves and those should be needled as I described in the Advanced Course. You are correct to needle the paravertebrals specifically upper lumbar and I would also check the obturator nerve as it will refer to the lateral pelvic wall. The above in combination with manual therapy of the thoracolumbar junction/upper lumbar should give you a good result. If the pain persists /unchanged I would move him on to a pelvic specialist as the source may not be neuromusculoskeletal. Hope that helps