BLIGHT ALERT: 2900 b/o of Knox Place SE -- Who's responsible?!

A concerned community resident posted the following photos to The Great Ward Eight Facebook page inquiring for some assistance with what is clearly a blighted and vacant building. Word on the street is that the tenants were forced to move years back and the building has fallen into further disrepair and has become a magnet for litter and trash. 

Inquiring minds want to know who owns this building and what can be done to get it cleaned up ASAP?!

At the risk of sounding like a broken record this would not be tolerated west of the river and it shouldn't be tolerated here. 

Including photos below courtesy of Robin McKinney.