Complex sentence: With Lachlan fighting for life, two witnesses are interrogated the night of Lachlan's shooting who Steve recognizes after he pushed them out the way while he was running down the stairs to escape.
Split into simpler sentences: With Lachlan fighting for his life, two witnesses are interrogated about the night of Lachlan's shooting. They recognize Steve because he pushed them out the way while he was running down the stairs to escape.