It reminds of Amanda's statements after walking off the job in Berlin. She said that because she had the flu for a couple of days in the week prior to starting the job, she still felt sick on the day she started working, so she left ... and she was bored ... and she didn't have anything to do ... and she wanted to have fun in Berlin ... and "ciao sucker".
There have been some attempts to argue that Rudy acted alone, but that requires that he murdered Meredith, most likely got blood on his shoes, left the room without leaving any visible bloody footprints in the hallway, went to the bathroom near the front door and did not flush, then removed his shoes, went back into the bedroom, got blood on his barefeet, walked to the bathroom at the back of the house, left a bloody footprint on the mat but none of his DNA in that bathroom, and then mopped up his footprints in the hallway. Somewhere in all of this, he went into Amanda's bedroom, did not disturb anything or leave DNA, got her lamp, plugged it into the hallway outlet, put the lamp on the floor, and locked it in Meredith's bedroom.