Can landlord verbally intimidate and threaten retaliatory punishment for speaking at a public hearing?

Question Details:

Four people were planning on speaking in opposition to the landlord at a public hearing. The hearing was held before the County Commissioners. Prior to the meeting the landlord used verbal threats and intimidation in an attempt to influence these people to not testify at the hearing. A signed petition was not handed in because of the landlords menacing manner and one scared person removed their name. One person was singled out of the group and punishment in the in the form of lost privileges previously allowed have been rescinded, more implied. Any laws broken or my civil rights impeded?

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