Dispatch audio has been released. Also, the two officers rolled up and spoke to the caller before performing the welfare check.
Ok, I tracked it down.
The neighbor sounds concerned and from the tone of his voice he makes it sound like the circumstances of the door open late into the night and seeing no one moving is suspicious.
It appears to me his description of circumstances and suspicions may have led the police officers to believe the situation was more dire than it was.
He may have meant well but the neighbors' concerns seem to have raised suspicions for the police that were unwarranted causing them to believe foul play or a crime may have been committed when it was as simple as the woman left or wanted her door open at 2:30 am.