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October 20, 2021: School children from all over Donegal County, whose family homes were affected by the fragmentation of mica blocks, gathered outside Dáil Éireann to protest. Video: Brian O'Brien

Protesters outside the offices of Letterkenny Donegal County Council in May last year. Cassidy Brothers, a Buncrana company, provided most of the blocks for houses affected by mica in the northeast of Donegal. Photography: Joe Dunn

David Cassidy's company provided most of the building blocks in the northeastern part of Donegal when it built houses that are now affected by the destruction of mica. For the homeowner, this is simply a nightmare.

However, Cassidy was shocked by the "very personal and sinister witch hunt" of his family circle and business.

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