To be fair, I can understand this oversight. If I owned 118 houses, had a beer fortune to manage, and was coping with early Alzheimers I might forget to pay property taxes on one of my houses.
McCains Defaulted On Home Taxes For Last Four Years, Newsweek Reports
Newsweek is set to publish a highly embarrassing report on Sen. John McCain, revealing that the McCains have failed to pay taxes on their beach-front condo in La Jolla, California, for the last four years and are currently in default, The Huffington Post has learned.
Under California law, once a residential property is in default for five years, it can be sold at a tax sale to recover the unpaid taxes for the taxpayers.
http://www.huffingtonpost.com/2008/06/28/mccains-failed-to-pay-tax_n_109785.html