Photographs of injuries while a person is in the hospital can graphically show the visible injuries or scars that will be with the victim for a very long time. Professional photographers with portable studio lighting can take photos of a much better quality than the amateur with a camera and small flash. Crash damage, properly recorded, can be a very dramatic exhibit. Jurors tend to equate damage to speed and if that is the point you are trying to make, one picture is worth a thousand words. When taking pictures of wrecked cars, remember, film is cheap compared to the amount of information it contains and the value of the one great photo to a jury.
Aerial photos are another option to diagrams and scale models.
Aerial photos can be taken as obliques, that is outside of an airplane window at an angle to the ground, or as a true vertical. True verticals are taken with the camera pointing straight down to the ground. This results in a view similar to a scale diagram but includes many details that may otherwise be ignored during a ground survey. There are many factors in aerial photography you do not encounter on the ground such as vibration of the aircraft and strong shadows. A true vertical must be taken no more than 5 degrees off vertical.