How To Take Crime Scene Photos

The Basics Nobody Talks About

Most people think crime scene photography is just snapping pictures of evidence. It is nothing like that. It is a systematic documentation process that needs to survive courtroom scrutiny. I have seen entire cases weakened because the photographer missed something obvious on day one and spent three years explaining why the prosecution needed to start over. The actual process starts before you point the camera at anything. You need to establish your gear and your plan. A full-frame DSLR or mirrorless camera with a prime lens in the 35mm to 50mm range works for general documentation. A macro lens matters more than people realize when you are photographing small trace evidence. Bring two cameras if you can. One for general documentation and one dedicated to close-up work. Changing lenses at a scene is a waste of time and introduces contamination risk. The standard approach follows three framing levels. Overall shots first, then mid-range shots, then close-ups. Overall shots show the scene in context without any reference object. The goal is to let someone look at the photo and understand where they are. Mid-range shots include a scale and show the relationship between evidence items and their surroundings. Close-ups show the evidence detail with a scale placed next to it. You never skip this order. If you go straight to close-ups, the defense will tear your documentation apart for lacking context.

I learned this the hard way on a homicide scene about seven years ago. The room had two windows, both open, with screens removed. I did my overall shots from the doorway, then moved in. On my third or fourth close-up of a bloodstain pattern on the hardwood floor, I noticed the sun had shifted enough to change the shadow angle significantly from when I started. The timeline in my notes didn't match the lighting anymore. I had to go back and redo every close-up because the directional lighting on the pattern was no longer consistent with my initial documentation. That scene took six hours instead of three. The lesson was simple. Weather and lighting are not static. You need to note the time on every frame, and if you are working across a long window of daylight, you plan for re-documentation or you use off-camera flash to control the light completely.

What the Manual Doesn't Cover

Scale placement is where most beginners fail. The scale needs to be in the same plane as the evidence, not floating above it or buried beneath it. If you photograph a bloodstain on carpet, you lay the scale flat on the fibers next to the stain. If you photograph a wound on a body, you place the scale against the skin in the same plane as the injury. Get this wrong and measurements become unreliable. The defense does not need to prove you are wrong. They just need to create reasonable doubt about your measurements. Another thing that catches people out is the horizon line. When doing mid-range and close-up shots, you need the camera sensor to be parallel to the subject. Tilt the camera even slightly and you introduce perspective distortion. That distortion becomes a problem when someone later tries to take measurements from the photo itself. I once had a case where a juror asked why the footprint looked elongated. The photographer had held the camera at an angle instead of keeping it level. The answer took twenty minutes and the juror still looked confused. Keep the camera level. Use a bubble level on your hot shoe if you are unsure. Flash usage is a minefield. Direct on-camera flash blows out details and creates harsh shadows that obscure texture. Bounce flash or off-camera flash gives you more control. But bouncing flash indoors means your light output changes depending on ceiling height and color. White ceilings reflect differently than beige ones. This matters for color accuracy. If you are relying on the photo to show the true color of a substance, you need a color correction card in your first few shots. Place it in the frame, take a photo, then remove it. Without that reference, white balance shifts can make a red stain look brown in court photos and back again in your review software.

Common Mistakes That Cost Cases

The biggest mistake I see is insufficient photo count. People take five or six photos of a scene and call it done. A moderate indoor scene usually requires between forty and eighty photographs minimum. Outdoors, you are looking at well over a hundred. Every entrance and exit point needs to be photographed. Every piece of evidence. Every relevant surface. You photograph until someone with no knowledge of the scene could reconstruct it from your photos alone. Another mistake is skipping the audio log. While you photograph, you should be narrating what you are doing into a recording device. Say the time, describe what you are photographing, note your position relative to the scene. This creates a contemporaneous record that backs up your notes. Judges and juries find audio logs credible because they are hard to fabricate after the fact. Negative space matters more than people think. Every photo should have enough negative space around the subject so the viewer understands the spatial relationship. Don't fill the frame with a single bullet casing. Include the floor texture, the nearby wall, whatever establishes where that casing sits in the room. The frame should answer the question of where, not just what.

When Photography Isn't Enough

There are scenes where standard photography simply cannot capture what you need. Active fire scenes with heavy smoke degradation. Large outdoor areas with thousands of potential evidence items. Scenes with complex three-dimensional blood spatter that needs angular documentation. For these situations, you bring in 3D laser scanning or photogrammetry. Neither replaces traditional photography. They complement it. The scan gives you the spatial data. The photos give you the visual texture and color that scans cannot replicate at resolution. The main bottleneck with 3D scanning is time. A full room scan with a terrestrial LiDAR unit takes about twenty to forty minutes depending on setup and processing. You still need to photograph individual evidence items separately. Some attorneys assume the scan is a substitute for photography. It is not. The scan is an additional tool. If you rely on it exclusively, you lose the high-resolution detail that a properly exposed macro photograph provides.

The Uncomfortable Truths

Crime scene photography is physically uncomfortable. You spend hours on your knees on dirty floors. You crawl through tight spaces. You work in weather that ranges from freezing rain to ninety-degree humidity. Your knees will hurt. Your camera gear will get contaminated. This is why protective gear for your equipment matters. Lens covers, plastic bags for the camera body, and disposable gloves for handling scales and reference objects all reduce the chance of cross-contamination. The equipment also fails. Memory cards corrupt. Batteries die faster than expected in cold weather. Flash units cycle slower when you are shooting at high power settings. I always carry three spare batteries and two empty memory cards minimum. A dead battery in the middle of a scene means you are either working blind or sending someone back to the vehicle, which breaks your workflow and potentially compromises the scene integrity. Digital workflow adds its own problems. Transferring images from the camera to a laptop at the scene is standard practice now. But not every officer has a rugged laptop that works in rain or dust. Card readers fail. File formats get compressed by poorly configured cameras. Set your camera to shoot RAW and keep the JPEG as a secondary file. RAW files preserve the full sensor data and give you recovery latitude in post-processing that JPEGs cannot match. A JPEG shot at high compression loses highlight and shadow detail permanently. You cannot recover it later.

What Actually Works in Practice

The workflow that survives scrutiny is methodical and boring. Arrive. Secure the scene. Walk the perimeter without touching anything. Note entry and exit points. Photograph the overall scene from multiple angles before moving inward. Photograph mid-range with scales. Photograph close-ups with scales and angle shots. Maintain an audio log throughout. Document your camera settings for each shot. Label every image with a filename that references the scene number and shot sequence. Chain of custody starts with the filename. This process takes time. A small indoor scene might take two to three hours for a single photographer. Larger scenes easily consume four to eight hours. Rushing produces gaps. Gaps produce questions. Questions produce reasonable doubt. The alternative is doing it right the first time and spending the extra hours at the scene instead of spending extra weeks in court explaining why your photos are incomplete.