Here is the 112 page report from the National Academy of Science debunking the Dictabelt.
https://nap.nationalacademies.org/read/10264/chapter/1 EDIT: Updated link
It looks like that Michael T. Griffith's work is trying to prove that the Mormon Church is God's one true church.
https://www.amazon.com/stores/Michael-T.-Griffith/author/B001KJ1LWG?ccs_id=1f1aa332-7d7d-405e-a985-3fe57a97ccf5#

Michael T. Griffith joined the Church of Jesus Christ of Latter-day Saints in 1977 at the age of nineteen. From 1979 to 1981 he served a mission in the Texas Dallas Mission. Brother Griffith has attended Ricks College, Brigham Young University, Austin Peay State University, Mount Wachusett Community College, and Haifa University in Israel, where his studies centered around ancient history and foreign languages. While at Brigham Young University, Brother Griffith worked as an assistant to Dr. Ross T. Christensen of the Society for Early Historic Archaeology. In 1982 that organization published his paper on the famous Lehi tree-of-life stone, The Lehi Tree-of-Life Story in the Book of Mormon Still Supported by Izapa Stela 5. In 1983 Brother Griffith graduated in Modern Standard Arabic and Egyptian Dialect from the Defense Language Institute in Monterey, California. He graduated with honors in Hebrew from the same institution in 1987. In 1989 he completed an advanced summer program in Hebrew at Haifa University. Brother Griffith is the author of four books: A Ready Reply; Signs of the True Church of Christ; Refuting the Critics: Evidences of the Book of Mormon's Authenticity; and One Lord, One Faith: Writings of the Early Christian Fathers as Evidences of the Restoration. Brother Griffith has held several Church callings, including Ward Clerk, Sunday School and Primary teacher, Elder quorum Presidency First Counselor, and Ward newsletter editor. He is married to the former Rosemarie Lynn Pratt, and they are the parents of five children.
I'm not putting a lot of faith in his writings...
https://nap.nationalacademies.org/read/10264/chapter/1 EDIT: Updated link
It looks like that Michael T. Griffith's work is trying to prove that the Mormon Church is God's one true church.
https://www.amazon.com/stores/Michael-T.-Griffith/author/B001KJ1LWG?ccs_id=1f1aa332-7d7d-405e-a985-3fe57a97ccf5#

Michael T. Griffith joined the Church of Jesus Christ of Latter-day Saints in 1977 at the age of nineteen. From 1979 to 1981 he served a mission in the Texas Dallas Mission. Brother Griffith has attended Ricks College, Brigham Young University, Austin Peay State University, Mount Wachusett Community College, and Haifa University in Israel, where his studies centered around ancient history and foreign languages. While at Brigham Young University, Brother Griffith worked as an assistant to Dr. Ross T. Christensen of the Society for Early Historic Archaeology. In 1982 that organization published his paper on the famous Lehi tree-of-life stone, The Lehi Tree-of-Life Story in the Book of Mormon Still Supported by Izapa Stela 5. In 1983 Brother Griffith graduated in Modern Standard Arabic and Egyptian Dialect from the Defense Language Institute in Monterey, California. He graduated with honors in Hebrew from the same institution in 1987. In 1989 he completed an advanced summer program in Hebrew at Haifa University. Brother Griffith is the author of four books: A Ready Reply; Signs of the True Church of Christ; Refuting the Critics: Evidences of the Book of Mormon's Authenticity; and One Lord, One Faith: Writings of the Early Christian Fathers as Evidences of the Restoration. Brother Griffith has held several Church callings, including Ward Clerk, Sunday School and Primary teacher, Elder quorum Presidency First Counselor, and Ward newsletter editor. He is married to the former Rosemarie Lynn Pratt, and they are the parents of five children.
I'm not putting a lot of faith in his writings...



