They did not appear to be on a mercy mission,IMHO.
The video I saw was on MSNBC, two female cops pushing a cart around looting shoes, the reporter asked what they were doing? "Watching for looters" The reporter said they are all over in here, look! The cop said "Yea, so are you" implying he could be arrested for being in the store! LOL. The reporter just shook his head and the cops continued to loot.