Archaeologists are accustomed to conducting "surface surveys", whereby they inspect the ground surface recording and collecting evidence of past human behaviour.
In a forensic context, such evidence occurs when a person has died or been killed outside and the natural processes of decomposition and scavenging by animals and insects affects the position of the body or body parts.
Much like aging a particular fossil or relic to determine the age of the find, the forensic archaeology scientist is often asked to age a particular crime scene to determine when the crime may have been committed.
This is especially true with the identification of unearthed grave sites or found skeletal remains.
The archaeologist will examine a potential crime-scene identified by the witness and try to determine if their testimony is true or not.