I actually read the thread that the kid posted in, in the M5 forum a couple of months ago when the incident happened. Plenty of members gave him a warning about the speeds that "his fathers" M5 could go. He posted about the top speed limiter and was going to find out with a couple of his friends. Another member on the forum that was local to the kid's area found the news article with a mangled up M5 in the pictures and they put 2 and 2 together to find that the kid hadn't responded. Turned out the kid was the one in the news article. Let me see if I can find pictures.
http://www.m5board.com/vbulletin/e60...ts-m-mode.html