Complex sentence: Michaela's friend was the only witness and she ran back into the market to get help in which time the abductor was able to escape with Michaela and she has not been seen since or heard from since.
Split into simpler sentences: Michaela's friend was the only witness around and she ran back into the market to get help. The abductor managed to escape with Michaela and she has not been seen since or heard from since.