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.
Concrete hardens to 600PSI (Minimum) after 24 hours. This means that 5 three grown men could all stand on a pogo stick (if that were possible) who's base covers 1 square inch without harming the concrete. You walking with shoes on exert about 10 PSI, well below anything that could damage the new pour.