Eddie was very busy being taken to Wayne manor. So busy, he completely forgot about his responsibilities. His biggest responsibility was Scarecrow. The thought of Scarecrow couldn't have been further from Eddie's mind. Yet Scarecrow's fist was slamming against the front door of Eddie's now abandoned hideout.
"RIDDLER! I'M TIRED OF WAITING!" Scarecrow demanded with a yell. Eddie and Scarecrow had a complicated relationship. But they had been planning a mission together for months. A mission that would kill hundreds and send the city into panic. Tonight, was supposed to be a night of planning. Eddie killing Bruce was a spontaneous act and was not something Scarecrow knew about. Scarecrow growled to himself as he was still left alone. He had been standing there for ten minutes now, ignoring the puzzle that kept the front door locked. Scarecrow didn't like puzzles.
Finally, he looked at the puzzle. He then realized how easy it was. As he solved the puzzle quickly, the front door opened. It was another sign of the Riddler losing his touch. Scarecrow marched in and slammed the door behind him. He began to yell.
"RIDDLER, WHY THE HELL HAVE YOU BEEN WASTING MY TIME—" Scarecrow paused. He immediately saw three things. An electric chair, Eddie's signature green hat on the ground, and a destroyed car battery. Scarecrow had been to this hideout many times. But he had never seen these things simply laying around at his hideout before. His curiosity was peaked.
"Riddler, are you here?" he called out. He was surprised to hear no response. His absence was now apparent in a way Scarecrow couldn't ignore. He began to walk around some more. Eddie's computers (and computer monitors) were still on. The air conditioning was still on. He looked to Eddie's desk. There were notes of scribbled green pen everywhere. And when he spotted the pen on the desk, it was still open. Scarecrow knew better than to assume Eddie had forgotten to close his pen. He muttered to himself as he began to look through the notes.
"Has the Batman gotten the best of our beloved Riddler?" the notes were nonsensical. His handwriting was scribbled, and the words themselves appeared as incoherent psychobabble. Scarecrow came to the correct conclusion; Eddie was hearing voices when he wrote these notes. He began to search all over the hideout.
After an hour of investigating, Scarecrow came up with two conclusions. A correct conclusion, and a incorrect conclusion.
"My god...the Batman is dead..." he muttered to himself. "And the Riddler...that bastard. He betrayed me. The months of work were for nothing...he betrayed me...."
Scarecrow stormed out of the hideout. He knew exactly where he was going and exactly what he was going to do. He was going to kill Edward Nygma one way or another.