While leaving him at daycare this morning, I was getting the walker out of the car, turned to see him with his pants around his knees preparing to relieve himself. Grabbed him and yelled "NO!" and pulled up pants. We were in the parking lot adjacent to a children's park. I was afraid of someone calling police for indecent exposure. Spoke to his caregiver later and he said it had happened on his watch also. He is a high functioning ALZ patient but has lost this inhibition. What should I be doing to control this behavior?