So I want to tell his parents about it as probably his private keys is saved in his personal PC or email or his phone or some paper
And no I cannot go to meet them as I'm in another country now but I have his father's phone and another friend of mine living close to them
So do you guys think it's a good idea to tell his parents about it ? To search of they find some twelve words it's a key to some hisen coins ? Or what do you guys think?
If your friend was smart his seed was
not on the computer (or if it's there is in a password protected archive you'll never break). So get them search for a piece of paper containing
* either one or more lists of "random English words"
* either list of "strange letters/numbers" like KyNyPnXbYu31vwAfngmhYHdAb6jMymCRu6zTsmptZbQB7EtLSBuE (yes, you need to try to give them an example or explain a lot)
That's not so difficult to achieve and if the mother tongue is not English the list of words may somehow be more visible.
Of course, telling them such news needs certain skills, since it's probably very early after their loss and the may not care of anything really. But you have to tell them think about it. They may do.. later on, maybe even after years...
Maybe it's enough to not sell/throw away anything for a while and maybe someday you get to explain more detailed face to face.