According to the article, the standoff took place at the house. Do you think "police were called in" also works perfectly? Would you consider it just a matter of perspective? "Called out" seems more likely to be used from the prospective of an outsider or officers being dispatched out on the report.Police were called out this morning after the woman threatened another person with a hammer before fleeing to a Goldsmith Crescent address.
"Called in" is viewed by victims or other people who are at the scene.