Reading the original post, he tracked the wounded deer for two hours (doesn't mention the distance) and when the blood trail stopped, he searched a 75 yard radius from the end of the blood trail. Sounds like he started tracking too soon and pushed the deer.

geterdun - Rob recommended that you read his post here: http://www.huntingnet.com/forum/tm.aspx?m=2272257

Lots of good info here - gotta give the wounded deer a chance to bed down and bleed out.