@Marmunia1975
The EA could definitely sue on copyright pics grounds. I don't think he has any control over them going solo. They can do what they want. What makes him think he has lost commission?? Just curious.
The EA lost commission because he delivered an asking price buyer.
They are also pretty sure they've been "played" with a non existent new buyer.
Additionally most contracts with EA's specify if it's an exclusive contract to seek the house and any notice (and grounds) to terminate the services of the EA.
It would definitely include that the work of the EA wrt to marketing (photos, layouts, blurb etc) were owned by the EA.
In short the sellers have taken all the EA's legwork and stolen it to market the house themselves and presumably save the commission.