显示先前在Picturebox中扫描或检索的图像

I just want some help for my project which is RFID attendance system. The RFID tag should be scan to retrieve the information and Image from the database mysql. The first student will scan his RFID tag to display his picture in picturebox1 and when another student scan the picturebox1 will be updated to a new student picture and data and the previous one is on the picturebox2 displayed The issue here is how can I display the previous Image of the student. Just only the Image ,the data is not included.I just want some help for my project which is R