An official website of the United States government. Here's how you know
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock () or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Federal Bureau of Investigation Federal Bureau of Investigation
Home • About Us • Laboratory Services • Forensic Science Communications • Back Issues • April 2002 • Figure 1, Lim, Kong Boon

Figure 1, Lim, Kong Boon

A line graph with a diagonal line from the lower-left corner to the upper-right area with dots near it upward from about halfway.

 

Back to the article