You're right, 2008 off of Solana Beach, not San Onofre (GW hot spot). Here's the article: https://www.theguardian.com/world/2008/apr/26/usa1
Right, the wrong place at the wrong time. Real sorry your swim buds had to go through that, losing a good friend while doing something they loved to do. But very happy most returned to continue swimming in that area.