Forensic Expert Witness Profile


Katherine Thatcher

Art Asset Adviser: an Art & Antique advisory group
19468 N 101st Street
Scottsdale, AZ 85255

Phone: 480-650-5027


Katherine is an art consultant providing collection & asset management needs to individuals, corporations, non-profits, museums & UHNW. Services include acquisition, appraisal, brokerage, curating, interior design, estate planning, estate sales, expert witness testimony, exhibition lending, asset management, speaking appearances, & art & antique collecting tours. Nationwide clients have relied on Katherine for extended projects, including collection management, lending programs, & interior design with an asset appreciation focus incorporating art, furniture & unique objects. Appraisals can be produced for insurance, estate planning & donation. She is currently serving as Expert Witness on the California Superior Court case involving the Estate of Michael Jackson. Her career began at the Smithsonian Museums, Sotheby’s in London, an appraisal firm in San Francisco & Ellingson Interior Design prior to starting her own firm incorporating her diverse experience. Expert Witness testimony in art cases may include valuation disputes, divorce, & other issues.

Curriculum vitae

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  • Fine & Decorative Art & Antique Appraisal; Insurance, Estate
  • Acquisition, Sales, & Donation to/for Museums & Collections
  • Expert Witness Testimony: Michael Jackson case currently
  • MA from & formerly at Sothebys in London
  • Smithsonian Institution: NMAA, OD & TSA prior work history
  • Corporate & private collection needs & art fair tours
  • Curating, Lending, & Asset Management & Consultation
  • American Society of Appraisers since 96, reaccreditating
  • Interior Design consultation with art, antiques, & specialty
  • Insurance loss, estate dissolution & divorce cases