Why didn't Sirius contact anyone?

[Inge]

No: HPFGUIDX 102850

In PoA we are told that Sirius is captured and sent directly to 
Azkaban, without a trial. Yet it seems that Sirius had over 12 hours 
from he left Godrics Hollow, untill he is captured. Why on earth 
didn't he contact anyone. Maybe noone knew that he and Pettigrew 
swopped the secretkeeping, but it seems (in PoA) that Lupin would 
have believed him if he had told, and Dumbledore as well. How come he 
didn't get in touch with the Order at that time? That would have 
helped him catch pettigrew, and he would have Dumbledores support. 
This would also most certainly have prevented him from going to 
Azkaban. Yet dispite his many options, he chose to chase him on his 
own...? all if this caused me to rethink the way things happened in 
Godrics Hollow. Lupin stubbeles over the fact the harry hear both 
Lily and certainly James voice when is in contact with the demntors. 
Could there be some details about the death of Lily and James that we 
haven't been told yet, and is that why Sirius doesn't contact anyone?
________

Lene, who firmly believes that a cup of cocoa can solve anything..