''Its stupid they cant even sell it or use it"...interesting comment.
It's not just an interesting comment. It is a confession.
He so is the perp.
His brother said "Telefon kullanmaz, bir şey kullanmaz."
which means "He doesn't use telephone. He doesn't use anything"
Lavy didn't translate the last bit because it made little sense at that point and I wouldn't either. But now I think it's important.
What his brother wants to say is "He doesn't have a cell phone. He doesn't have anything (of that sort)." Meaning he doesn't possess any electronics devices.
So have can somebody, who is so "analog" knows that iPAD and US cell phone would be of no use (difficult to sell) in Turkey.
And he was with his family when he heard the news about SS on TV and commented that "this woman's an (secret) agent. Perhaps CIA. She must have been on a mission in Turkey." A pathetic attempt of self-justifying the crime he committed.
And now he's on his way to Hatay? (That is if his brother is telling the truth.)
He will either try to sell the electronics there or he will cross the border to Syria and disappear there. Or maybe both.
Plus his brother's DNA matches the DNA recovered from underneath SS's fingernails.
And also his brother said "He is not mentally stable". This also fits my theories.
Case solved. Almost.
Had SS's itinerary not thrown them off, LE would have solved the case much sooner.