Updated: 5:06 a.m. on October 18, 2018

MILWAUKEE COUNTY (CBS 58) -- The Milwaukee County Sheriff's Office released the following statement about the death of the deputy:

“We are deeply saddened by the passing of Deputy Van Callies. He was a valuable asset to our agency and involved in many specialized units. Our thoughts and prayers remain with his family and friends.”

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Posted: 9:37 p.m. on October 17, 2018

MILWAUKEE COUNTY (CBS 58) -- A Milwaukee County Sheriff's Deputy has died of a fentanyl overdose.

According to the Medical Examiner, Deputy Van-Thanh Callies died after taking prescription medications.

He died in March after he was found unresponsive in his Franklin home.

His death has been ruled accidental.