"...Lowrie and her husband said the house down the street was in
foreclosure for more than a year and the owner walked away. Then, the
mortgage company went out of business.

Apparently, that opened the door for someone to take advantage of the
situation. But, Kenneth Robinson said he's no squatter. He said he
moved in on June 17 after months of research about a Texas law called
"adverse possession.""

http://www.wfaa.com/news/local/Texas-Law-Lets-Stranger-Move-Into-330000-Home-125528248.html