The Invisible Man and Dr. Kemp

Dr. Kemp accidentally stumbled into the doctor's house looking for medical supplies and realized, hey, I actually know that guy. He hears a voice that tells him not to panic. It's the invisible man who addresses Dr. Kemp by his name. That's because he actually knows Kemp. Griffin goes for a sleep in Kemp's bedroom and locks the door, which is pretty rude. Kicking a man out of his bedroom. Thankfully the bullet just grazed his wrists, so he's not dying. But that's what the blood is from. And apparently when the blood drips out, he explains it coagulates and that's why he can see the blood. We don't know