They are called the Coroner.
Anything found at a crime scene is considered evidence.
The scene of a crime in the first instance is usually investigated by a constable who has responded to a call to attend the scene. His job is to take down details of the crime and statements from witnesses. It is also his job to preserve the crime scene until the Scenes of Crime Officer (SOCO) arrives to take over the investigation.
umm...Only if the scene was very very old hahaha actually it could be when bones are involved specifically like crime scenes in desert regions.
Generically, they are referred to as Forensic Evidence Technicians, but their actual job titles can depend on the what their employing agency chooses to call them. (e.g.- Fingerprint technicians - Evidence Technicians - Crime Scene Search Technicians - Etc).
A person who commits a crime is known as a criminal.
Depending on the circumstances, a person can be called an “accessory” to the crime, for harboring a fugitive. The person is an accessory to a crime if the person: Conceals or destroys evidence of the crime, or Harbors or conceals the person committing the crime.
a witness
a witness
Seeking a crime scene job can be a good career choice for many reasons. The crime scene field enjoys a steady job outlook in both good and bad economic times. Salaries for crime scene jobs tend to be quite good. Workers can provide a good quality of life for their families. Many people who work crime scene jobs also derive a great sense of satisfaction because they perform such important services for the community. The major crime scene job that is growing in career popularity is crime scene cleanup. Crime scene cleaners are called in to clean and disinfect crime scenes after the police have finished their work. This job requires special equipment such as protective body suits. Crime scene cleaners must possess expertise in sanitation procedures and specialized cleaning techniques. Many people in this profession gain their skills on the job through apprenticeships. Just like with any other job, some drawbacks come along with a crime scene job. One obvious drawback is the grisly nature of dealing with human remains. Some people cannot handle the horrifying sights and overpowering odors of crime scenes day in and day out. Bodily fluids like blood along with bodily remnants like brain matter are confronted daily by crime scene cleaners. A person needs to possess a strong stomach to succeed in a crime scene job. The work hours can also be unpredictable. A call might come in at three o'clock in the morning from a distraught family member, and it is the job of professional crime scene services to be available 24 hours a day, seven days a week. If a person can adjust to the challenges of a crime scene job, then he or she can look forward to a fulfilling career. Workers in the crime scene field report that clients are for the most part highly appreciative of their services. Tragedy is unfortunately unavoidable, but crime scene workers help to alleviate its effects. Helping families get through a traumatic time in their lives is one of the best parts of a crime scene job.
Criminal sociopath.
Such a person would be an accomplice or a partner in crime.
an accessory after the fact may be what you are looking for