Complex sentence: Detective Pete Sebeck is called in to investigate the death of Pavlov but when a connection is made between the two programmers and Cyberstorm, the FBI takes over led by Agent Decker.
Split into simpler sentences: Detective Pete Sebeck is called in to investigate the death of Pavlov. However, when a connection is made between the two programmers and Cyberstorm, the FBI takes over led by Agent Decker.