Máirtín Ó'Muilleoir 'won't step down'
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Nama scandal: Ó Muilleoir 'won't step down' over coaching

Máirtín Ó Muilleoir says he won't step down while an investigation gets under way into how Stormont's finance committee chair handled its Nama inquiry.

The finance minister said he had "absolutely no knowledge" of a back channel of communication between the committee's Sinn Fein chairman, Daithi McKay, and a witness.