9news.com.au | Desperate search underway for missing Perth grandfather 9news.com.au Western Australia police are desperately searching for an elderly man with dementia, who's been missing for 48 hours. Eighty-seven-year-old Perth grandfather Alexander Henderson is also deaf and has not been seen since Thursday. Alexander Henderson ... Police continue search for 87-year-old Alexander Henderson Emergency services search Perth's north for missing man Search for elderly man continues |