RE: Pretty sure I have one down.
How long did you wait before you went to the crash sight.
It is unusual when a wounded deer doesn' t break away radically from other deer it is with [even its own offspring]. You have probably hit the nail on the head when you said that the arrow may be lodged in the opposite shoulder and unless you pushed her she shouldn' t be that far away but your main hit could be liver [and maybe one lung] . . . and that calls for a four hour wait before tracking.
Many well hit deer that I have shot don' t lay [or don' t lay much] of a blood trail for around 20 yards or so. Use the old fall back, go to the spot you think the hit happened then start a semi-circular search pattern in the direction the deer ran getting larger as you get farther from the hit site. The last tip I have is get down on your hands and knees . . . you' d be surprised at how much more you might see.