Last week: Obvious 4, less obvious 7 (for the fifth and sixth, see the outline of two in the top right corner and the seventh the footprints so the seventh horse had actually disappeared when the picture was taken.
This week:
Police hire a detective to find an escaped prisoner. The detective narrows his search to one of three different houses. After taking a closer look at an aerial photo of the three houses, the detective instantly knew which house the prisoner was in.
The trick of the week