This is the most common type of forensic art. The artist interviews the victim or witness, and together, they create the best possible representation of the suspect based on the victim or witness's memory.
Composite drawing with surveillance video / photo assistance
In some cases, surveillance video of the suspect may be available, and while grainy and insufficient for identification, it can serve as a powerful tool to refresh the victim or witness's memory. Working with copies of the surveillance video, the forensic artist and witness are able to develop an extremely accurate sketch of the suspect.
Identifying deceased victims: postmortem drawings and facial reconstruction