Catching Forgeries and Aiding Justice<br />After comparing the handwriting in those letters with others he had written to loved ones,<br />I testified at a pretrial hearing that the boyfriend had not written the first set.<br />For an item that someone may have doctored, we have tools, such the video spectral comparator,<br />that uses ultraviolet light to verify whether someone has used a different pen to falsify a document.<br />The majority of what I do is handwriting comparison, to ascertain the identity<br />of the person whose signature appears or whether a document has been forged.<br />I sat side by side with an experienced colleague while he worked, read articles about handwriting and pored over old proficiency tests.<br />Everything from bank robbery notes, bomb threat letters and other threatening letters to driver’s licenses and birth certificates.