Time to end this joke line of reasoning I have tolerated.
Vin’s head was deliberately moved to outside the Garage. There were no accidents involved in it reaching there.
That head did belong to Vin.
Repeat this: “Kicking the head would constitute as touching it”.
Kicking the head would constitute as touching it
Can you tell us any more about how the head was found when the group being Shallan, Arya, Adolin and Astrid found the head?
Define “device”, because Kalladin placed the head in a way that when the door was broken down it lifted the head, gravity then dropped the head, and naturally Kalladin placed the head there purposefully to move it outside.
Repeat this in red :
“Vin’s head was in the garage when the group entered the garage”
It was found on the ground, facing them, right outside the door to the Garage. That’s all from the narrative and Reds, and all you need.
I dont know how to define a device. But I can refute this.
The door never touched Vin’s head
Confirmed.
Vin’s head was in the garage when the group entered the garage
After the group opened the door to the garage and before they entered it, Kalladin left the garage, he was noticed but ignored by them, or thought to be a hallucination, he then dropped Vin’s head in the floor and ran away.
If they noticed Kaladin leaving the room, they would have stopped him. In short, this did not happen.
It’s still possible if someone in the group was his accomplice and only that person noticed him leaving.
Repeat: “When the group left the garage, Kalladin was still inside it”.
Kaladin left the head in the garage. Later, Dalinar, being alive at the time, moved the head outside before the rest left the garage]
Confirmed.
When the group left the garage, Kalladin was still inside it
How?
Also, credit to Zepfur for pointing out that Dalinar was never confirmed dead! Looks like Alex and farispie had to have someone bail them out again. 
Dalinar left through the window while Kalladin somehow distracted the group (he may have revealed himself to the group. Kalladin dropped the head in the garage and Dalinar picked it up
Then whose body did they find?
Kaladin’s of course.
Take this
When Kaladin entered the garage, Dalinar ambushed him and killed him. He took the head, waited by the window, and soon as the the rest broke down the door, he left via the window. He then dropped the head outside and escaped
It was confirmed that the body belonged to Dalinar.
That doesn’t mean that Dalinar’s body was the one that was in the garage, it just means at some point, they found Dalinar’s body and confirmed it.
In fact perhaps there was no body at all, and Dalinar simply took the head while Kaladin hid in the garage .
There was a body.