Chapter 4

Sherlock was doubled up in shock, nursing his possible concussion. John was unsure of what to do and no time to do it. The bullet left the barrel and flew straight and true. John was knocked off his feet by the impact, and Sherlock could hear John crash into the water.
The sound of the gun going off seemed to reverberate in the air and Sherlock's heart stopped. His lungs didn't want to work, the air wouldn't go in, and his eyes widened in complete and utter loss, clouded over with guilt.
When his eyes focused again, they did so on the gun which hung loosely in the elder brother's grip. The gun that had just- he cut off the thought and scrambled to his feet. He yanked the gun from the man's grasp and stood up stiff with emotion. The gunman noticed the change in Sherlock's demeanor and immediately changed his tune. He began to smile innocently and back away slowly.
Sherlock reached out and snagged the front of his captor's shirt, using it to pull him backwards towards the middle of the bridge. He threw the gun into the middle of the street for the time being. Sherlock focused all his angry energy on the suspect, daring him to try anything with his eyes. Sherlock suddenly lets go of the man's shirt and pushes him up against the concrete wall of the bridge. He isn't aware that this man is talking to him, much less begging him to stop. He steps back a full step and looks at the brother disdainfully and then puts all his feelings behind one good punch that has that satisfying CRACK of a fist slamming into a skull.
The suspect toppled over the side of the bridge and Sherlock just watched him fall, leaning over the edge to watch the last bit.
Somehow, Sherlock managed to keep it together for another few moments while he collected his gun, and buttoned up his coat. Then his world went to heck. John was all that went through his head, and Sherlock sprinted down the bridge and skidded around the corner. He ran down to the waters' edge to try and see where his partner had gone. It wasn't all that hard of a deduction, there was a pool of blood where John had been standing, and it covered the stones leading into the water. That's when Sherlock noticed the water. It was red, and it made a path showing him exactly where his army doctor was.
Tears finally ran down Sherlock's face, followed by racking sobs.