Chicago Sun-Times | Man with dementia, Alzheimer's missing from Elmhurst Chicago Sun-Times Man with dementia, Alzheimer's missing from Elmhurst. Posted: 04/21/2015, 09:17pm | Sam Charles. David Ruppert | Elmhurst police photo. Police are searching for a man with Alzheimer's who went missing after he traveled from Elmhurst to Oakbrook ... Police searching for missing Elmhurst man with Alzheimer's Missing Person: David P. Ruppert, age 85, of Elmhurst |