Do we have the keys so we don't need to break down the door?
You are lucky in that you have an off-duty officer working nearby. You call him off his post and have him stay at the gas station with the victim. You tell him to let her respond to one more phone call from the subject and make up a story as to why she is running late. She is not to respond to any more phone calls after that. You figure it will confuse him enough to take his attention off the second victim as he tries to call back. You have EMS respond to the gas station and stage. That serves two purposes: check out the victim and be close by in case the suspect gets violent.
Your security element is in place and they have not been seen. You load up in one car to limit the chances of being spotted. The suspect has now tried calling back three consecutive times but has stopped. You assemble your team and start walking up to the door, keys in hand. Before you can put the keys in, the door flies open and the second victim runs out. You make entry and clear the house but find no suspect.
You debrief the second victim and she states the suspect started freaking out when the other victim didn't return his calls. He started looking out all the windows and saw one of your officers in the back of the house. The suspect then ran into a room, giving her the chance to run outside.
You secure the perimeter. You assume that the suspect either went out without being seen or is in the attic section of the house. Your K-9 team gets there, you make your announcements, and you clear the house again. The handler takes the dog around the house but finds no track. You hear a noise coming from the roof section moving toward the garage area.