Complex sentence: There she finds that he used to work for the St. Michael's Church and is in fact the killer, but before she can act he leaps from his wheelchair-having only pretended to be disabled-and attacks her.
Split into simpler sentences: There she finds that he used to work for the St. Michael's Church and is the killer. Before she can act he leaps from his wheelchair-having only pretended to be disabled-and attacks her.