BRAZOS COUNTY -- The Brazos County Sheriff's Office is currently searching for a missing College Station man, who's been missing since early Thursday morning.

Sheriff Chris Kirk says 67-year-old Alec Pearson was last seen near his home on Scrimshaw Lane in the Nantucket subdivision around 8:30 Thursday morning.

Around 75 volunteers are searching in a five-mile radius near where Pearson was last seen.

The Sheriff's office is searching by foot, on ATV, by horse and tracking dogs have been brought in. A helicopter has also been searching by air.

Sheriff Kirk says Pearson is not a threat to the community but may be confused if confronted because he is suffering from Alzheimer's Disease.

This is the fourth time that Pearson's has gone missing.