Suspect arrested following threats made against county council member

Published on January 19, 2024

LĪHUʻE – A 67-year-old Līhu‘e man was arrested Friday at approximately 4 p.m. in connection with a case involving threats against a County of Kaua‘i council member.

Glenn Gruenhagen was arrested for Terroristic Threatening in the 1st Degree and Harassment.

Letters directed at council member Billy DeCosta were allegedly left at Historic County Building on Jan. 12 at approximately 12 p.m. The letters were perceived as a threat and the incident was reported to the Kaua‘i Police Department on Jan. 16.

“We would like to thank the community for remaining vigilant during this investigation,” said Kennison Nagahisa, Acting Captain of KPD’s Investigative Services Bureau. “We also appreciate the diligent work of our officers in securing an arrest for this case.”

Gruenhagen is currently being held at KPD cellblock with bail set at $5,050.00. The investigation remains ongoing.

Glenn Gruenhagen, 67, was arrested for Terroristic Threatening in the 1st Degree and Harassment. 

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