ARLINGTON A 77-year-old Arlington woman reported missing by her family on Dec. 18 was found dead Thursday less than two miles from her home, police said.Maria Arrocha suffered from Alzheimer's and had a history of becoming easily confused, officials said. Her body was found about 2:15 p.m. in a wooded area in the 1300 block of East Abram Street in Arlington.On Friday afternoon, the Tarrant County medical examiner identified the remains as Arrocha's. Her death was caused by exposure, the medical examiner ruled. There were no signs of foul play.Arrocha was last seen by family members about 9 a.m. Dec. 18 at her home. Two days later, the temperature dropped to 25 degrees.Officials have said that Arrocha shows signs of having Alzheimer's disease and has a history of becoming easily confused. Arlington police had been searching for Arrocha for two weeks. They found her body while working closely with a volunteer group, Search One Rescue Team, which uses dogs to help search, police said. The area is 1.7 miles north of Arrochas home in the 1800 block of Arbor Lane.