He tried to find a trail of blood, but there didn't seem to be one.

The last thing she needed right now was to be leaving a trail of blood.

We both looked at the trail of blood leading to the back door.

The blood trail didn't lead to any of the four walls.

This would make it possible to move the man without leaving a blood trail.

You've left a trail of blood across the whole Northwest!

The kid has followed my trail of blood from outside on the street into this place.

No doubt a tiny trail of blood led to their door.

Then she put her finger to the ground where the trail of blood led away toward the south.

A trail of blood led from the door along the gallery.