Ghost in the Pool

We moved into our new house a few months ago. We got a great deal on it. The right school district, big backyard with a pool, thousands below market value. One of our neighbors told us while we were moving furniture in that the previous owner was a single child family whose daughter had drowned in the swimming pool. They couldn't live in the house anymore after that and put it on the market cheap. Now that the weather's warmed up, we finally got to use the pool. I snapped the attached picture a few minutes ago to send to my mother-in-law. She wanted to see the kids splashing in the pool. I'll write more in a bit, I need to go check on the kids in the pool. It suddenly got very quiet out there..."