Herobrine coded in?

I have been reading some post's while they say that they have emailed notch and asked if he had a brother (in the earlier versions of minecraft of coarse) and he replied back that he did but his brother is no longer with us. Now think about this.... He had a brother--- his brother is dead. Herobrine INGAME is notch's brother....... And he's dead?
So thinking of this i have made 2 theories ether notch's past brother knew he was going to die soon so he ended up coding a man named Herobrine to vary rarely spawn in a world.... He programmed certian building's in the game for this new mob Herobrine to build. We all know that mobs may build things thanks to certaint mods and keep in your mind that he never told notch about this. So after that people started seeing him around the relese of the game and even after the realest of the game. After this thanks to the low low low spawn rate of this mob Herobrine notch has never found HIM and has been denying every theories because HE never coded it. How would he not find the file or texture? While maybe his brother has protected and hided the file and texture of this Herobrine mob so much that it's almost impossible to find. The other theorie is that notch heard of his brother going to die and tryed to add a dying character that would hant you so his brother would be remembered and it was hid the same way. Or he just wants to add a death mod into the game. And that's my therie. still skeptic ? while i dont have any proof for this but while i first tried the game out of peacefull- I heard anther player's foot step's. Hope that's enough for you to believe him! BYE.