Russell has the Samsung Galaxy Note 5 and he accidentally deleted his photos off the phone. Leo says that since Roger has Google Photos on the phone, it's likely the photos were automatically backed up. If he's lucky, that's the case. And any photos that have been deleted may still be in the trash can on the phone, where they stay for up to two months. There are some apps that could maybe recover his lost photos, but they have varying degrees of success.
The chatroom offers this article from pcworld.com, this page at cgsecurity.org, DiskDigger photo recovery from the Google Play Store, and lastly this tutorial at fonepaw.com.