The door was locked. London knew, that there is food behind that door. The guy was one of the people who early started hoarding, and some days ago, London saw him wandering around in the city. He was infected. And the door is locked, that means that he was infected outside before he could use the supplies. But breaking the door would make noise and noise attracts the infected.
London prowled out of the building, searching for a window he could use to enter the flat. There was one. Third floor. No fire stairs. He has to climb.
Luckily there was a drainpipe. It wasn't rusty but mossy and probably slippery. Anyways, it was the best way. London wasn't a bad climber but clibing a smooth wall alone without equipment...
After a few minutes, he reached the window. He smashed the glass, wary not to make much noise. Then he pulled his crowbar and entered.
The flat was clean and tidy. No signs of battle, no blood. Looked clean.
Then London noticed that the door has been barricaded from the inside. The owner couldn't have done this when he was outside.
There's something here.
London looked around. He found another locked door. He heard scratches. He tried to open, but it was locked from inside. He put his crowbar in position and opened.
The zombie couldn't even turn around before his head was smashed.
There was some canned food and other supplies in the flat. And it was safe now. A perfect hideout.
"Everyone has his price. Mine is a clean conscience."
If I make any spelling or grammar mistakes, just tell me (if you stay polite).
(Edit:Or if I write anything stupid.)