Time for you to get away. There are a number of ways to do. Just get out of sight of the guards. After that just work on getting higher up or finding a crowd to hide in for a little while.
All you need to do is get outside the yellow box that you can see on the mini-map. Just be sure that you are of the guard's line of sight. This is very easy to do. Just climb up a building or duck into a crowd. This memory will come to an end now.