Complex sentence: After failing to meet his brother, he returned to Los Angeles early on the morning of August 31, walking past officers who were staking out the terminal in hopes of catching the killer if he attempted to flee on an outbound bus.
Split into simpler sentences: After failing to meet his brother, he returned to Los Angeles early on the morning of August 31. He walked past officers who were staking out the bus terminal in hopes of catching the killer should he attempt to flee on an outbound bus.