That makes the timeline a little off IMO, or at least really tight. Cedrick was put to bed at 11 pm on July 9 (last seen just after midnight) so whoever disposed of his body either put it in a trash bin or local dumpster on the 9th or else they drove to the landfill themselves on the 9th or 10th.
Per current information it means whoever took Cedrick from his aunt's bed had to kill him and dispose of his body almost immediately after abducting him.
Johnson was arrested sometime in the afternoon yesterday, July 10. If he's involved then the total time span would have been +/- 12 hours.