What did Pharaoh do when he heard Moses had killed an Egyptian?

Pharaoh sought to slay Moses, carrying out capital punishment, after hearing that Moses, Egypt’s second man, had killed an Egyptian. Moses fled from Pharaoh’s presence and dwelt in the land of Midian, east in the Sinai Peninsula area, and sat down by a well.

Les explains that after Moses killed the Egyptian, he had to flee. Murder was just as much against the law then as it is now, only the results were a lot worse. In Exodus 2:15, when Pharaoh heard that Moses, the second man of Egypt, had killed an Egyptian, Pharaoh sought to slay Moses—carrying out capital punishment. But Moses fled from the face of Pharaoh and dwelt in the land of Midian, east in the area of the Sinai Peninsula, and he sat down by a well. Les also says this is where he gives credit to the movie The Ten Commandments.

Exodus 2:15

Now when Pharaoh heard this thing, he sought to slay Moses. But Moses fled from the face of Pharaoh, and dwelt in the land of Midian: and he sat down by a well.

Why did Moses have to flee after killing the Egyptian?

Moses fled because Pharaoh sought to slay him after learning that Moses, the second man of Egypt, had killed an Egyptian. Murder was against the law, and Pharaoh intended capital punishment. So Moses escaped from Pharaoh's face and dwelt in the land of Midian, east toward the Sinai Peninsula.