It can, but it depends on how he had it configured.
There are many "Cloud services" that can do an automatic backup of photos.
Whether that happens 'right now' or waits until a WiFi signal is available depends on how he set it up.
Have him log into his Google Account on the web with a PC, the open the Square box of dots Menu and look for Drive... if he had the auto saved to Google they should be there.
I have an app that works with PhotoBucket that does the same thing.
I have other file manager apps that can do that also.
If he is unaware of setting the phone up to do, it will not auto save to anywhere in the Cloud.
even if he had an extSDcard in the phone with all the photos saved on it, that is lost to him now.
Regular backups are a must in the "Real World".
Backup, backup, backup and then just to be safe, backup again somewhere else.