The fact that ICE agents are indiscriminately arresting undocumented immigrants suggests that they are doing a mass deportation rather than focusing on felons.  The young lady in question wasn't wanted for any crimes so why would they be going after her?  Generally, they know who these felons are; she wasn't one of them.  The only thing that I could think of is that they are arresting all immigrants without papers regardless of their status and picked this woman up because she was publicly speaking out.  

What is happening is agents of the federal government being allowed to freelance as brownshirt bullies and arrest who they want 'cause.  It is just mean and awful and I am glad that Cupich is saying NO.