A selective list of groups Dr.Mann has presented sworn evidence and testimony, written expert reports, investigated, and or consulted on with the legal system.

Christian Congregation of Jehovah's Witnesses
Watchtower Bible and Tract Society, Inc.
Dahn Yoga
Bikram Yoga
Circles of Light
The Way International
Church Universal and Triumphant
Order of Christ Sophia
JZ Knight and Ramtha, Inc.
Lord Our Righteousness (Wayne Bent)
Weigh Down Ministries (Gwen Shamblin)
World Mission Society Church of God (WMSCOG)
Servants of the Holy Family
NXIVM
Falun Gong
Regnum Christi
Opus Dei
Masterpath
Landmark
Endeavor Academy