If you witness a possible crime, move to safety, call the appropriate emergency service, and report what you directly observed. Do not chase a person, enter an unsafe scene, touch evidence, or turn a camera into a reason to move closer.
This U.S.-focused checklist separates an immediate emergency from suspicious activity, preserves the difference between observation and inference, and gives police or emergency dispatchers a usable location, description, direction, and timeline. Local procedures differ. Follow the dispatcher and responding officers.
First minute: safety, location, emergency call
- Move to cover or a secure place. Lock a door or vehicle if that is the safer route. Keep an exit available.
- Call 911 for an immediate threat, violence, fire, medical emergency, crime in progress, or a person who may be in danger. Use the local non-emergency number for a past event or activity without an immediate threat. Do not assume 311 is the police non-emergency number in every city.
- Give the location first. State the address, intersection, business, floor, unit, entrance, landmark, or direction of travel. If the call drops, dispatch has the response location.
- Describe the event in plain language. Say what is happening now, whether anyone is injured, whether you saw a weapon, and where the involved people are.
- Stay on the line. Answer the call-taker’s questions. Do not end the call because questions seem repetitive; information can be relayed while the call continues.
The national 911.gov FAQ explains that the call-taker will ask for the emergency location, callback number, nature of the emergency, and details about people involved. It also says not to hang up until instructed. The page was checked August 3, 2026.
What to report without guessing
| Record | Useful detail | Avoid |
|---|---|---|
| Location | Exact address or intersection, side of street, entrance, floor, landmark, and last known direction | A location copied from an app without checking that it matches the scene |
| Event | Actions you saw or heard, order of events, and whether the event is continuing | Assigning a motive, diagnosis, identity, or crime category you cannot verify |
| Person | Clothing from head to toe, approximate height and build, hair, visible distinctive features, carried objects, and behavior | Filling memory gaps or treating race, age, or clothing alone as suspicious behavior |
| Vehicle | Color, body type, make or model if known, plate or partial plate, damage, stickers, occupants, and direction | Chasing the vehicle or reading a plate while standing in its path |
| Weapon | What you actually saw, where it was, and how it was used | Calling an unseen object a gun or approaching to confirm |
| Victim | Location, visible condition, immediate danger, and whether emergency care is needed | Entering an uncleared scene unless the dispatcher tells you it is safe and gives instructions |
| Time | When you first noticed the event, key sequence points, and when the person left | Presenting a device timestamp as exact before checking clock accuracy |
Separate observation from inference
A useful statement makes its confidence visible. “I saw a person pull on the rear door twice, look through the window, and run east when a light came on” is an observation. “A burglar was casing the house” is an inference. Report the behavior and let investigators classify it.
- Use “I saw,” “I heard,” or “the camera shows” for direct records.
- Use “I think,” “approximately,” or “I could not tell” when uncertain.
- Do not compare notes with other witnesses before each person records an independent account.
- Write down the event promptly in your own words, including uncertainties and the viewing distance, lighting, obstructions, and duration.
- Do not repeatedly watch a shared clip before giving your first account; record what you personally observed separately from what later footage shows.
Do not turn documentation into exposure
Photos or video may help only when recording can be done from an already safe position. Put the phone down if it blocks your view of an escape route, draws attention, requires moving closer, or delays the emergency call. Do not livestream a developing event or post suspect, victim, address, or tactical details while the response is active.
If a home camera captured the event, preserve the original file and the system context. Do not trim, filter, annotate, rename, or re-encode the only copy.
Security-camera evidence checklist
| Item | Record before changing anything | Acceptance check |
|---|---|---|
| System identity | Camera name, exact model, recorder or cloud service, account owner, firmware, timezone, and current plan | The device and storage source can be identified later |
| Clock | Displayed time, timezone, daylight-saving setting, and measured difference from a trusted clock | Any clock offset is written down rather than silently corrected first |
| Original record | Event start and end, pre-roll and post-roll, native export type, filename, size, and export time | The full relevant interval opens on a second device |
| Continuity | Motion gaps, camera disconnects, overwritten time, recorder health, power events, and network events | Missing footage is disclosed rather than described as proof nothing happened |
| Copies | Original retained in place, working copy, delivery copy, recipient, method, date, and case number | At least one verified copy remains after handoff |
| Privacy | Audio, private areas, bystanders, neighboring property, household users, and sharing authority | Evidence is supplied through the investigator’s requested route, not a public post |
For camera-selection and evidence-retention planning, compare the site’s outdoor camera guide, doorbell camera guide, and security-camera overview. A camera supplements a witness; it does not make confrontation safe or guarantee identification.
When officers arrive
- Keep your hands visible and follow instructions. Responders may not know who is involved.
- Identify yourself as the caller or witness and point out any immediate danger.
- Give your independent notes. State what you personally saw, what another person told you, and what a camera later showed as separate records.
- Tell the officer about original footage before sending compressed clips through text or social media.
- Ask how to provide files, the case or incident number, and the correct follow-up contact.
- Do not enter a taped, restricted, or hazardous area or move an object to make a better picture.
Scenario branches
| Situation | Immediate branch | Do not |
|---|---|---|
| Violence, weapon, injury, fire, or active break-in | Move to safety, call 911, give location and immediate danger, stay on the line | Approach, chase, block an exit, or enter the scene |
| Vehicle collision or hit-and-run | Call 911 for injury or danger; note vehicle, plate, damage, occupants, and direction from safety | Follow the vehicle or stand in traffic |
| Event ended with no immediate threat | Use the local police non-emergency route; preserve notes and video | Assume a national non-emergency number works everywhere |
| Suspicious activity without an emergency | Describe the specific behavior, time, location, and direction to the appropriate local authority | Report identity or appearance alone as the behavior |
| Store theft or workplace incident | Follow staff or site security procedures and call emergency services if danger develops | Physically detain, search, or pursue someone unless that is your trained and authorized role |
| Domestic violence or possible coercive control | Call 911 for immediate danger; give the exact address and what you heard or saw | Knock on the door or warn a possible aggressor that a report was made |
After the event
Keep the case number, first account, original media, export log, officer or investigator contact, and any request for follow-up together. Do not publish a person’s face or accuse someone online because the image appears clear. Misidentification can harm an uninvolved person and the investigation.
Stress reactions can include poor sleep, replaying the event, anxiety, guilt, or feeling unsafe. Ask the investigating agency about local victim or witness assistance. The U.S. Department of Justice Office for Victims of Crime help directory lists national hotlines and services; it is not a replacement for 911 during an emergency.
20-minute witness and evidence acceptance test
- Minutes 0-4: from a safe place, practice stating the exact location, callback number, event, injuries, weapon observation, and direction without adding an assumption.
- Minutes 4-8: identify the correct local emergency and non-emergency routes and save them without relying on 311.
- Minutes 8-12: export one harmless test clip in the native supported method; record camera, time, timezone, clock offset, filename, size, and export time.
- Minutes 12-16: open the export on a second device, retain the original, and verify that a delivery copy can be made without overwriting it.
- Minutes 16-20: confirm household members know not to chase, confront, livestream, touch evidence, or post an accusation; record the next camera-clock and export check.
FAQ
Should I call 911 if I am not sure a crime is happening?
Call 911 when there is an immediate threat, possible violence, injury, fire, emergency, or crime in progress. For a past event or activity without an immediate threat, use the local police non-emergency route. Describe the behavior and let the call-taker determine the response.
Should I record a crime on my phone?
Only from an already safe position and only after the emergency call is underway when needed. Stop recording if it requires moving closer, attracts attention, blocks an escape route, or interferes with dispatcher instructions.
What details matter most?
Start with the exact location, what is happening now, injuries or immediate danger, any weapon actually seen, a behavior-based person description, vehicle and plate details, and direction of travel. State uncertainty clearly.
How should I give security-camera footage to police?
Preserve the original and its full relevant interval. Record the camera, source, timezone, clock offset, filename, size, export time, copies, recipient, and case number. Use the investigator’s requested delivery route instead of posting it publicly.
William is a tech buff and former corporate security officer turned cybercrime analyst. Computers have few secrets left for him, but home security and alarm systems… Well, those have plenty of secrets for their users, which William is now uncovering and explaining. His articles on home security helped many people take the matter seriously, invest in highly performing systems, and avoid becoming victims of burglaries.
Marybeth Haas says
Please report it to the authorities if you see or suspect human trafficking occurring. I work in this space and it’s very common to see this around Super Bowl time and areas of high population/crime. Speak up, even if you’re unsure it never hurts to go off your gut instinct. Awareness is the first step.
Alarm Reviews says
Scary but thanks for the tips.
Peggy says
I always try to report when I see something awry. I would hope that if my family or I was in trouble that someone would take their time to do the same. I support our local law officials and love some of them very dearly, but at the same time I’ve spoken to some very rude dispatchers. I can understand why some people would be hesitant about reporting situations, assuming others would report them.
Rose says
A lot of people just don’t want to get involved when it comes to crimes. I’ve seen people look the other way so they could continue on with their days because it’s a “hassle” to have to stop and help people and talk to the police.
Kevin says
I’m one of those people that don’t pay attention to the people around me, which is pretty bad. I need to watch out for myself better and protect myself. I might be able to help others out too.