During a hearing for a related employer and sale of business application, the applicant union sought to adduce evidence from a witness regarding an alleged scheme by the responding parties' principals to avoid the union's bargaining rights.
The responding parties objected, arguing that the union had failed to put this allegation to their key witness during his earlier cross-examination, in violation of the rule in Browne v. Dunn.
The Board upheld the objection, finding that the union's failure to give the witness an opportunity to respond to the serious allegation of a scheme caused considerable prejudice.
Given the late stage of the proceedings and the lack of explanation for the delay, the Board barred the union from calling or relying on evidence relating to the witness's involvement in the alleged scheme.