Contact him and remind him that the photos are yours, tell him the copyright infringement is frowned upon and you would like your photos to be removed from his page...nicely.
If he does not remove them, you can report the photo theft to Facebook.
Click on the picture to bring up the larger version.
At the bottom right-hand corner of the picture there is the word Options, click that.
Then click Report/Remove Tag.
There you will find "Is this your intellectual property?" on the bottom right hand side of the pop-up.
Click that and choose either of the two options....Send Message to the offender or Report to Facebook.
These types of thieves are running rampant on FB...
Go get 'em