Why won't this work? First, serve several certified/verified notices over a period of several months to the squater to come to court regarding property rights charges that the owners charge him with. Include everybody who is squatting on the property... not only the main squatter. When they don't show up for court because they will lose their squatter's rights by being gone from the property, get the judge to sign a warrant for their arrest, to compel them to come. Supply the local sheriff with the warrant, so that he has to do his duty, and bring the squatters to court. Meanwhile, have a sympathetic party (agent of the owners) re-squat the property while the squatter is in court. --- Or some form of this.