The Austrian Schoolgirl that ran away to be with ISIS was beaten to death with hammers.

via Business Insider

The Austrian schoolgirl beaten to death after trying to escape ISIS was reportedly passed around militants as a sex slave before being murdered.
Samra Kesinovic, 17, is believed to have died at some point last year, just months after reaching the group's territories in Syria.
Reports that she was killed with a hammer by militants emerged last month, and a Tunisian woman who was kept in a house with her has now come forward.
The unnamed woman told The Sun that she and Samra had been kept as a "sexual present for new fighters" reaching ISIS, also known as ISIL, Daesh, or the Islamic State.
She claimed the Austrian teenager had made several attempts to flee before she was caught and killed.

Pretty damn horrific, but decisions have consequences and she chose badly.  Still.  How horrible could her last few months of life been?  I wonder if death was somehow a mercy.