Update: 4:00 am 11/11/2021 - SUBJECT FOUND: Around 3:30 am the Hillsboro Police was notified that Giakoumis was located in Grafton, MA after being involved in a single-car motor vehicle accident. Giakoumis was uninjured and is now safe.
A Silver Alert has been issued for 69-year-old Dennis Giakoumis of Hillsboro. Giakoumis has recently been diagnosed with dementia. He left Hillsboro at 11:30 am on November 10th for Arlington, MA, and never arrived. Giakoumis should be driving a gold 2004 Toyota Camry NH 433 4334. Please contact your local law enforcement agency if you have any information concerning the whereabouts of Giakoumis.