The time regulation of the public security bureau's on-site investigation is that the time from entry to exit is the on-site investigation time. Scene investigation usually refers to the investigation of the crime scene. After the occurrence of a criminal case, investigators conduct an inquest on the people and things related to the crime, as well as places, articles, people and corpses, so as to find out the facts of the crime, collect evidence of the crime and expose and confirm the criminals.

Traffic accident site investigation content

Investigate the scene of the accident, and find out the accident vehicles, parties, roads and their spatial relations and the meteorological conditions at the time of the accident. Fixing, extracting or preserving on-site evidence materials. Ask the parties and witnesses and make an inquiry record.

Conduct other investigations. When investigating the scene of a road traffic accident, the traffic police shall, in accordance with the provisions of relevant laws and standards, take photos of the scene, draw a scene map, extract traces and material evidence, and make a record of on-site investigation.

In the event of a road traffic accident in which more than three people are killed, on-site camera shooting shall be conducted. The site map and the record of site investigation shall be signed by the traffic police, the parties concerned or the witnesses who participated in the investigation. If a party or witness refuses to sign or is unable to sign, and there is no witness, it shall be recorded.

If traces or evidence may be lost due to time, place, weather and other reasons, the traffic police shall fix, extract or save them in time. If the driver of a vehicle is suspected of drinking alcohol or taking psychotropic drugs or narcotic drugs under state control, the traffic control department of the public security shall promptly draw blood or take urine samples in accordance with relevant regulations and send them to a qualified institution for inspection.