the u.s. army sergeant who left his post in afghanistan and was held by the taliban for five years was found to have be ` going over to the other side with a deliberate plan .
former military intelligence officer said he had been told the information by two senior sources who knew about a 2009 naval criminal investigative service investigation into bergdahl 's activities .
the investigation reportedly included a forensic review of bergdahl 's computer which showed his apparent intent to travel to uzbekistan .