These residents who live a floor above Diamond's apartment were shocked by the events of the last 24 hours.
But authorities believe Diamond's actions were those of a disgruntled employee who left his job at Simon & Schuster book warehouse in the spring after 6 years allegedly felt harassed by coworkers.
The DA, Michelle Henry, says the 32-year-old Diamond returned yesterday first shooting and killing 46-year-old, Angel Guadalupe outside the building and then firing at 52-year-old Reginald Woodson, a shop steward, as Woodson tried to run back inside.
The DA says Diamond told authorities his rent was due and he didn't want to ask his parents for money so he had no option.
Officials say Diamond did not know Guadalupe but believe the attack on Woodson may have been premeditated.
Diamond is being held in the Bucks County Jail.
