Luke didn't immediately enter the house.
He took out his phone to contact Susan and informed her of the situation at the scene. The call wasn't for backup but to report in.
If there really were criminals in the house and a gunfight broke out, having reported in advance could save a lot of unnecessary trouble.
Susan agreed to his going inside to have a look, cautioned him to be careful, and to call for support immediately if anything happened.
At the same time, she unusually approved his overtime.
Luke took out his pistol and admonished, "Daisy, I'm going in to check the house, you wait outside.
If you hear a gunshot, dial 911 and then contact Captain Susan."
Once 911 is dialed, the operator would arrange for nearby patrol officers to provide support as soon as possible.
Daisy asked with concern, "Will there be any danger?"
"Just as a precaution."
