At 21 :46 the crime scene photo of bullet hole is marked as 3' 11" high. When John Reese dug the bullet from the wall it was shoulder high and later Detective Carter had to look up at it.
However, the notation in the file indicates the bullet hole is 3'11" above something, which indicates the measurement wasn't taken from the floor. The 3'11" would appear to be the height of the bullet hole above the hallway table, making it one of many measurements taken by forensics to enable scene recreation.
When the judge receives a call from the kidnappers, they hang up on him after a minute, and the judge only hears a dial tone. However, the judge is using a cell phone, which don't have dial tones.