The symbol carved into the body is a pentacle not a pentagram. A pentacle is a 5 pointed star in a circle, a pentagram is commonly a 5 pointed star inverted not on a circle.
Lucy is in the hospital room and hears the news about the shooter. While a vital signs monitor is showing activity, not a single lead is hooked up to her, meaning the monitor is running in Simulation mode which creates a simulated set of vital signs.
The LAPD designates lone-officer patrol units as "L" units (Lincoln) and standard 2-officer patrol units as "A" units (Adam). Officer Chen is on patrol alone yet identifies herself as "Adam-19" when it should be "Lincoln-19" or whatever number is assigned.