The possession of John grieves

 we tracked the criminal down in a side street. He wasn't afraid he seemed to dare us to shoot him.
I told him to give himself up. He got into the rusty old car before we could stop him. We followed him through the city. He almost gave us the slip, then he slowed on purpose as if he wanted us to catch him.
He made no sense. I told my partner Ralph to hold off on calling for back up.
We came out onto green open spaces near mitch ridge open county school.
He drove up onto the curve churning the grass up down to dark brown mud. 
The sun's poweful rays at the angle it was capturing it all like a kind of movie set. I braked and My partner and I exited our vehicles with guns drawn. The man on his knees, hands held high, his head slightly prostrate, but we could see the desperate grin on his face.
Some teachers and the headmaster raced down to see the commotion. We told them to hold back. 
The man said his name was John Grieves and that he had gone to this school. My partner protested, said he had also gone to this school. He said the man didn't look like the John grieves he knew.
I told my partner to forget it so we could get him cuffed, in the car and into a cell before he did anymore damage.
So I cuffed the man. But before I could lift him up, my partner asked him what year he was from.
The man said ninety six. And my partner balled his fists, saying it was his year. He said the man was lying. The subject just seemed too sensitive for my partner.
I almost had the man in the back of the cruiser. When the principal appeared out of nowhere with the yearbook.
My partner took it off his hands before the principal could even speak, saying that he could guarantee noone with John's appearance or name would be found in there.
I told him this was unacceptable, but as he was already scanning the pages of his year I let it go.
My partner Ralph looked up, staring accusingly at the principal. He asked him where his picture was. Saying he had a yearbook at home with a clear picture of himself. The principal said that it was strange because he knew Ralph well. John our perpertrator began a very unnatural bout of giggling.
"Look at the face where yours used to be, it's mine." John grieves said.
Sure enough there was a picture of John grieves in his long fine wavy hair and demented grin looking back out of that small frame on the page. The problem was the face wasn't that of a teenager, it was his current face, as if the photo had been taken a minute ago. A man of almost thirty.
As my partner Ralph uttered angry sighs of disbelief, a tear fell from his eye.
It hit the page but instead of a drop of salty liquid, it was a dusty ball that broke into tiny feathers as it hit the paper of the yearbook. I looked up as if some kind of joke was being played on us.
The principal was sprinting away as if the pin on a grenade had been pulled. His legs moving quicker than an animal in fright. John was staring at my partner's face leaning into him to expecting something to happen. 
My partner's head suddenly jolted up and I could see the eye from which the tear came out of was bulging and white, Pulsating with a dark shape floating inside it.
Just a white colorless blob, a pouch like thing that was growing out of it. which suddenly fell onto the page.
It was a membraine with a small birdlike embryo inside it.
It pulsated as Ralph screamed and screamed.
I could feel his raspy screams coming from the back of my own throat.
I tried to calm him, but his other eye began transforming. His screaming died down as his mouth started to close up. Then I started to scream against my own will. John our suspect was inspecting the embryo with his fingers.
My scream changed tone to something more birdlike. I stopped screaming and tried to talk.
My voice reverberated like the chirping of a bird.
At this the suspect John smiled in glee. The second membraine pouch fell from Ralph's eye socket almost bouncing on the yearbook. Ralph's body slumped to the ground, the skin on his face prickly like a defeathered chicken.
I pulled my gun and tried to fire. But my finger had already started transforming.
My arms and legs weakened. I was losing consciousness. John grieves took the gun from my claw like hand and started walking away, I too slumped. The shape of John Grieves slowly exiting my closing field of vision. Everything blurred, thus I was gone before I could say goodbye.