MATHIS, Texas – The San Patricio County Sheriff’s Office is asking the public for help in locating a man who was last seen in Mathis, Texas. Officials say William Robert Grabowske, 83, who is diagnosed with a cognitive impairment, was last seen on Feb. 21 in the 2200 block of County Road 1664 on foot. Officials say the man’s disappearance poses a “credible threat to his own health and safety.” Grabowske also walks with a stagger, officials say. If you have any information regarding this missing senior citizen, contact the San Patricio County Sheriff’s Office at 361-364-9600. Related: ‘Please stay inside your homes’: BCSO warns residents in far West Bexar County neighborhood of armed man