Restore deleted files on macbook

So my niece asked me for my help yesterday.. Apparently she accidentally deleted some pictures from a trip she took. I was looking online and see all this fancy software online but they want like a 100 bucks.. is there any decent possibly free software i can use to try and recover these?

Did she also delete them from Trash?

Go to the root of the drive and find the hidden folder .Trashes

I will have to take a look.. ill let you know