Nephew Died in Car Crash we need to unlock his phone Galaxy S6 (for his pictures and phone records)

Our nephew died in a car crash we need to unlock his phone for pictures for his funeral. We really need help. His mother is heart broken. She took it to the sprint store to try to get it unlocked and they said they couldn't do anything to unlock it. If someone knows of a subreddit that might be able to help please repost it to there. If anyone knows how to help please message me directly. This is a terrible tragedy for our family it would mean a lot to us if you can help.