Howard C. Rile, Jr., A. Frank Hicks, and Linton A. Mohammed are forensic document examiners continuously recertified by the American Board of Forensic Document Examiners (ABFDE), each with decades of full-time experience in working and testifying on cases involving questioned documents, such as:

• signature comparisons (wills, trusts, deeds, business contracts)
• handwriting examination (anonymous notes, medical charts, holographic wills)
• medical charts, involving questions of pages substituted or entries added or changed after the fact
• printing processes, typewriters, fax transmittals, photocopy manipulations
• ink and paper questions

Howard C. Rile, Jr., A. Frank Hicks, and Linton A. Mohammed are members of and current or former executive board members of the American Society of Questioned Document Examiners (ASQDE), the American Board of Forensic Document Examiners (ABFDE) and the Southwest Association of Forensic Document Examiners (SWAFDE). They participate regularly in the professional development meetings of these highly regarded organizations, as well as participate and hold membership in the American Association of Forensic Science (AAFS) (Questioned Document Section) and the American Society for Testing and Materials (ASTM).

Rile, Hicks & Mohammed are the successors to Harris & Harris, the oldest forensic document examination firm in Los Angeles. Linton A. Mohammed will be dividing his time between Southern and Northern California, and will be able to serve as a local expert to firms in the San Francisco and surrounding area.

The examination of questioned documents consists of the analysis and comparison of questioned handwriting, hand printing, typewriting, commercial printing, photocopies, papers, inks, and other documentary evidence with known material in order to establish the authenticity of the contested material as well as the detection of alterations.