I would answer yes to all 3 questions.
The first one because maybes they want to keep an eye on him, see what he's getting up to now that he knows about them and generally just keep one step ahead as now they know he could be a threat to them.
The second one because now they are probablys thinking they will be able to use him to help them with whatever it is that they are up to and using trubel to do so, and to keep him close.
The third one also maybes yes, if whoever it was that attacked them and killed Chavez or anyone else who may be onto them could have got ahold of it and And I can imagine there will be important information on it about what they are doing.
This is just my opinion though I don't know for sure.
The only question I have is how is nick going to get on the phone? And how is he going to answer it if you need chavez's finger print like she did when someone called her when they had kidnapped her and when Nick answered it?
The first one because maybes they want to keep an eye on him, see what he's getting up to now that he knows about them and generally just keep one step ahead as now they know he could be a threat to them.
The second one because now they are probablys thinking they will be able to use him to help them with whatever it is that they are up to and using trubel to do so, and to keep him close.
The third one also maybes yes, if whoever it was that attacked them and killed Chavez or anyone else who may be onto them could have got ahold of it and And I can imagine there will be important information on it about what they are doing.
This is just my opinion though I don't know for sure.
The only question I have is how is nick going to get on the phone? And how is he going to answer it if you need chavez's finger print like she did when someone called her when they had kidnapped her and when Nick answered it?