*Nick Gordon thinks he’s the key to saving Bobbi Kristina‘s life.

On Saturday, Gordon tweeted, “Let me in the hospital to see my girl and let her hear my voice SHE WILL WAKE UP!!!”

A frustrated Gordon is going public because he’s spinning his wheels with the Brown and Houston family. He has been barred from the hospital and several members of the Brown family have threatened physical harm if he shows his face.

Meanwhile Nick, according to TMZ, is the subject of a criminal investigation because of injuries on Bobbi Kristina’s body when paramedics removed her from her home after she was found submerged in the bathtub.

As we reported, doctors have already advised disconnecting B obi Kristina’s life support. However, Bobby Brown has resisted, believing prayer can work miracles.