(CBS) — An Iraq war vet suffering from Post-Traumatic Stress Disorder is still missing 10 days after he walked out of his home in the northern suburbs.

Dan Nerstrom (Facebook)

Dan Nerstrom (Facebook)

After two weeks of nightmares, Dan Nerstrom was ready to see a therapist. But his November appointment at the VA was pushed back a month, and his girlfriend, Amanda Tiffany, says the 30-year-old former Army Scout walked out of their Libertyville home Dec. 1.

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He left a letter that didn’t specifically say he would hurt himself, but she thinks it was a suicide note.

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Friends and relatives have looked, and police have used search dogs and a helicopter with a heat sensor, but so far have found no sign of the 6-foot-1, 175-pound blonde man with blue eyes. He may be armed, but Tiffany says the only person he would harm is himself.

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Dan Nerstrom, an Army veteran, has been missing since Dec. 1. (Amanda Tiffany)

Dan Nerstrom, an Army veteran, has been missing since Dec. 1. (Amanda Tiffany)

Army veteran Dan Nerstrom was wearing this hat and jacket when he went missing Dec. 1. (Amanda Tiffany)

Army veteran Dan Nerstrom was wearing this hat and jacket when he went missing Dec. 1. (Amanda Tiffany)