Complex sentence: Joe's childhood friend and wannabe gangster Marty Santorelli (Jason Spisak), the getaway driver for the job, is killed by Clemente who, after a lengthy car chase, is killed after being shot multiple times by a grieving Joe.
Split into simpler sentences: Joe's childhood friend and wannabe gangster Marty Santorelli (Jason Spisak), the getaway driver for the job, is killed by Clemente. After a lengthy car chase, Clemente himself is shot multiple times by a grieving Joe.