I just saw Ragnork for the 3rd time and this was all I could think of during the scene when Loki and Thor are in New York looking for Odin:

Presumably, Tony and the other Avengers are keeping an eye out for sightings of Thor and Hulk. Scanning the internet, news, social media etc for any sign that their friends are alive/back on earth. So imagine how confused they are when 1 selfie of Thor in casual clothes on a random New York street pops up on twitter with no explanation.  

With Loki rolling his eyes in the background, OBVIOUSLY not in prison like Thor inferred he would be.