It makes me wonder if anyone they knew had knowledge they were going to the park that day. Whether it was direct contact or by word of mouth from someone else they know. I know some really creepy people in the Cumberland County area, one being an ex pedophile, that would ask around about my kids when they were little. Possibly someone knew she was going to be at the park that day. Perhaps if the mom were to get out (not at all blaming mom), the person would have had a regular conversation with all of them and nothing would be suspected and he would've tried again next time. Just saying, there are a lot of creepy, obsessive people out there. It would be good to find out if the mom or grandmom has anyone they know, close or not, that is obsessed with either one of them or the child.