If the allegation is of recent lewd and lascivious acts, or of relatively recent anal or vaginal penetration, then the police will likely order a medical examination of the child and a forensic analysis. This may include analysis of the child's body, clothes and the location of the alleged incident.
Different types of decorative concrete involve different processes so timing will vary. However you should normally allow between 8 to 20 days for us to undertake and complete your job.
I used to be able to pour the concrete and set the poles by the end of the day, but I don't think the bagged cement available now days will do it. Lately, I pour the foundation, then set the poles in about three of four days, depending on the rain, the more the better.