Detective Clara arrived back at the Vance mansion during the quiet evening.
The large estate was brightly lit by expensive outdoor lanterns.
Sarah answered the front door wearing an elegant black silk dress.
She looked surprised to see the police detective standing on her porch.
Sarah: Is there something else you need tonight, officer?
Clara: I need to inspect the camera recorder in your security office.
Sarah: I told you earlier that the system is fully broken.
Clara: I still need to verify that for my official report.
Richard walked into the high foyer and greeted the detective politely.
He looked tired and stressed about the day's dramatic events.
Richard: Show her the security room, Sarah, so we can sleep.
Sarah bit her lip nervous as she walked down the hall.
They entered a small room filled with dark computer monitors.
Clara stepped forward and turned on the main power switch.
The screen flickered to life and showed several video files saved.
Sarah stepped back and reached for her phone inside her pocket.
Clara: Do not touch any buttons on this console, Mrs. Vance.
Clara clicked on the video file recorded at two o'clock today.
The video played clearly on the high-definition monitor screen.
It showed Elena cleaning glass tables far away from the pool.
Then it showed Sarah walking up behind the resting stroller.
Sarah gave the heavy stroller a quick push toward the water.
Richard gasped loudly as he watched the horrifying video footage unfold.
Richard: Sarah, what on earth did you just do?