There is disagreement over the legality. And the opnion is issued by a lawyer. Not a Jury.

www.oregonlive.com/politics/2019/06/oregon-governor-sends-police-to-find-missing-republicans-bring-them-to-capitol.html

The Legislature’s top lawyer advised lawmakers in 2016 that the state Constitution gives the governor the power to order state police to arrest absent lawmakers.

But, Legislative Counsel Dexter Johnson wrote, state troopers only have the power to arrest missing lawmakers in Oregon, not in other states or in Canada.

www.oregonlive.com/politics/2019/06/oregon-republican-senator-issues-threat-to-state-troopers.html

“Nothing thinly veiled,” Boquist wrote. “I have been in political coup attempts. I have been held hostage overseas. I have been jailed politically overseas … Not going to be arrested as a political prisoner in Oregon period.”

As Willamette Week has reported, Boquist is a U.S. Army veteran whose businesses include military training and an international operation that journalists described in the 1990s as a paramilitary force of armed American and Russian ex-military officers.

Boquist contends that state troopers only have the power to enforce criminal violations and arrest warrants, not to compel absent lawmakers to return to the Capitol during a legislative session.

In recent emails with Boquist, legislative lawyers have provided copies of their earlier legal opinions that the Legislature has the ability under the state Constitution to have a sergeant at arms or — with the governor’s approval – the Oregon State Police arrest absent members in order to compel their attendance at the Capitol.

Boquist, however, chalked up the lawyers’ conclusions in support of the practice as partisan favors to Democrats.

Additionally Senate Rule 3.01(2) allows the Senate to compel attendance, and that is done by the Senates SGT at arms.

HOWEVER the State Police are only allowed to do the following: “the state police, with the approval of the Governor, may be called upon by any other branch or department of the state government to enforce criminal laws or any regulation of such branch or department.”

However they are breaking no criminal law or regulation. They are at most, breaking a rule, which they OSP has no authority to enforce.

Additionally it is a direct violation of the separation of powers. With the Executive compelling the legislator into actions and it violates the Oregon Constitution. I quote the Oregon Constitution: “The powers of the Government shall be divided into three separate branches, the Legislative, the Executive, including the administrative, and the Judicial; and no person charged with official duties under one of these branches, shall exercise any of the functions of another, except as in this Constitution expressly provided”