After you find Ricky at the convenient store, he will run away. To find him, head towards the police station and go south towards a new map, make sure you go there during the day, you'll find him standing there next to the water.
I just found a bug, if you are on day 9, the event notification will trigger, but the event for finding Ricky will no longer be available. However, you should still be able to find him between Day 7 - 8. I will correct this bug and re-upload the game file.
