jogging nearly three years ago. cbs' charlie de mar is there. >> reporter: investigators were seen today at the home of xavier harrelson in the mobile home park where he lived. they had more questions for the family of the 11-year-old boy who went missing five days ago. >> it's been several days since he's gone missing. one of those nights was in the 30s. as more time goes by, that's got to be troubling from your point of view. >> with the report we have, what he was last seen wearing, a t- shirts and pajama bottoms and tennis shoes, that was a concern of ourselves. as the days go on, it's increasingly more suspicious and more concerning. >> reporter: samantha rix is a family friend and says she notified police after xavier's mom told her that her son was missing. >> i won't stop looking for that little boy. just hoping that good news is brought and that, you know, he's returned to us safe and he's such a happy little boy. >> reporter: more than 500 volunteers and responders gathered over the weekend to scour the area. the search centered around here,