Nicholas K. Oates, 25, is facing charges of arson, burglary and assault with a firearm in connection with the March 15 incident.
Police say Oates took some books off the shelves of an Amazon bookstore and lit them on fire. When a store employee tried to stop him, Oates allegedly pulled out a gun and pointed it at the employee.
On Tuesday, police disclosed that Oates is a disgruntled former employee of Amazon. It wasn't immediately clear if he worked at that Century City store.
The store and eventually the entire shopping mall were evacuated.
In the chaos, there were also concerns about a suspicious package found at the scene, but it was determined to be harmless.
He was identified as the suspect after investigators found his vehicle at the mall. They arrested him at Venice Beach Saturday night.
If convicted on all counts, he faces a possible maximum sentence of 21 years in state prison.
Anyone with information is asked to call LAPD Major Crimes Division at (213)486-7260 or 1-877-ASK-LAPD. Anonymous tips can be provided to Crime Stoppers at (800)222-TIPS.