With the Writ of Habeas Corpus, he would have to be detained. He signed the promise to appear under duress so he is no longer detained, so the writ is now moot because they are not holding him without reason. His best action would have been for him not to appear and if they did bring him in to have had the notice of mistake to be served as soon as he appears before a justice. And do the same thing that Derek Hill did.
Printed copy · Anthology Volume 1, page 29Printed copy from The Tender For Law Anthology, Volume 1, page 29 (printed 14 June 2014). Added by this site; not part of the Facebook export.