Dumbledore's possible reason to trust Snape!

[locadamor526]

No: HPFGUIDX 141229

I think that maybe the reason for why Dumbledore trusts Snape
completely 
may lie within Snape's childhood. As we've seen previously during 
Harry's Occlumency lessons with Snape, Snape's childhood was really 
nasty. Maybe Dumbledore had helped a young Snape thus creating a 
speacial bond and ensuring Dumbledore Snape's trust.