A good forensic expert also has to be a good educator, a good communicator, and that's part of the reason why we take the pictures, to show not only where the light sources are, and what we call the spill, the distribution, but also so that it's easier for the trier of fact to understand the circumstances.
Не только показать, где расположены источники света, но и для того, чтобы присяжным заседателям было легче понять обстоятельства дела.