but they cliamed not to have seen or heard any gunman so why would they.
to do that they would of had to of thought there was a gunman in there.
pluss they allready had enough men to do that anyway by daylight.
Jeremy's account was that there was a gunman in there so they had to operate from that assumption. Particualry since the phone was off the hook so they could not call those inside and their only means of communication- megaphone was met with no response.
That means:
1) they were all dead
or
2) any who were living were being kept from answering and the person holding them hostage chose not to answer either
SInce they had no way to know which was the case they had to assume the gunman was alive and could try to escape from a different door if they broke in. They thus set up a perimeter in case the gunman tried to escape and a raid team to clear the house.