Spy-sort of unit

How would I make a spy like this?

Let's say player 1 has a bunch of riflemen.
And player 2 should be able to make a spy. The spy appears to be player 1's own rifleman(controllable by player 1 too, but doesn't have an LOS of its own), and the other player 1 riflemen don't automatically attack the spy. now when player 2 uses the ability "come clean", player 1 isn't able to control the player 2 spy anymore.

if that's not possible, don't give it the player 1-controllable and "come clean" features, just make it look and feel like a player 1 unit but controllable by player 2.

if you can help me do it i will gladly give you credit in my map when it's finished.

well...if each player had a computer ally you could make each player allied with all the computers, and then give the unit to the computer and share control with "their" player.

(for ex, player 1 would share control with comp1, player 2 with comp2 ect, and all the players would be allied with all the computers)

Then just create the unit for the right computer and set its color to player 1's...


(If only player 2 can build spies or if the only unit for player 2 is a spy this becomes easier...)