The mainstream rags are reporting that Abdel-Majed Abdel Bary, or L Jinny, the rapper son of an alleged Egyptian terrorist, is under investigation in connection with the beheading of US journalist James Foley. You can read various accounts online, but remember this is a "reported story", meaning there is only one source and one report, with every newspaper effectively copying from the other. That's not to say it's bogus, of course.
L Jinny earlier this year posted an image on Twitter of himself holding a severed head alongside the caption: “Chillin’ with my homie or what’s left of him.”
His father, Adel Abdul Bary, was extradited from the UK to the US two years ago on charges of terrorism for his alleged roles in the bombings of two US embassies in East Africa in 1998.
YouTube has been removing L Jinny's music videos in response to the story. If you're inclined, you'll find them somewhere.
UPDATE: The plot thickens...