Residents protested Councilor Scott Harriman on Tuesday at City Hall, asking for an investigation or his resignation. Supporters say the attacks are politically motivated.
One victim says she was told by local postal staff that 7,000 letters were sent to residents alerting them to the tampering, which is being investigated.
The developer of Portland's Thompson's Point has turned his attention to Lewiston and, with the city, envisions economic development around the riverside park.
After conservationists spent years trying unsuccessfully to reclassify a stretch of the river, a group is suing federal and state officials to spur action.
