My question isn't so much about why LE may have kept this info from the Spierers, but why would the Spierers no longer want this guy's help? I wasn't clear whether the Spierers asked for him to come, or he offered. Regardless, if LE is withholding info, as appears to be the case, and this guy has discovered something (that LE also discovered), then why would they no longer want his help?