Had John been cast into prison when Jesus began his ministry?

Matthew: He had.

John: He had not.

Matthew says that immediately after his temptation, and before he began his ministry, “Jesus had heard that John was cast into prison” (iv, 12). Then “he departed into Galilee; and leaving Nazareth, he came and dwelt in Capernaum” (12, 13). “From that time Jesus began to preach” (17). This was the beginning of his ministry.

According to the Fourth Gospel, Jesus had called his disciples; had traveled over Galilee and Judea; had baptized (iii, 22); had performed miracles (ii, 1–11, 23; iii, 2); had held controversies with the Jews (ii, 18–21; iii, 1–21); had attended the Passover (ii, 13–23); had purged the temple (ii, 13–16); and after all these things “John was not yet cast into prison” (iii, 24).