I caught the new episode, and I love how they manage to make the anime look dark and morbid even in the daytime.
For those who have already read the manga:
I think this marks the beginning of Light's downfall as Kira. Before, we could somewhat empathize with him wanting to rid the world of villains and creating a paradise, althrough his dream of it is twisted and warped. But as soon as he starts going after the good people - Ray and L and everyone else - we stop seeing him as the hero and start seeing him as a villain.
Ray Penbar is especially crucial to this because not only was Ray the first good person he murdered, but if it hadn't been for his killing of Ray, Light would never have been exposed to L and L never would've been suspicious of him. If he had ignored everyone trying to find him and just kept killing criminals, he would've been fine. But overstepping that line ultimately caused his destruction.