She was set to have the man, either through diplomacy with England, or to end him by assassination through her spies.

Having determined upon his death, with relentless soul she pursued the cause as closely as though this exiled soldier were a powerful enemy at the head of an army in France.
Thus it was that she wrote to Queen Elizabeth, asking that "this arrant foe of France, this churl, conspirator, and reviler of the Sacraments, be rendered unto our hands for well-deserved punishment as warning to all such evil-doers." She told Elizabeth of De la Foret's arrival in Jersey, disguised as a priest of the Church of France, and set forth his doings since landing with the Seigneur of Rozel.

Further she went on to say to "our sister of England" that "these dark figures of murder and revolt be a peril to the soft peace of this good realm." To this, Elizabeth, who had no knowledge of Michel, who desired peace with France at this time, who had favours to ask of Catherine, and who in her own realm had fresh reason to fear conspiracy through the Queen of the Scots and others, replied forthwith that "If this De la Foret falleth into our hands, and if it were found he had in truth conspired against France its throne, had he a million lives, not one should remain." Having despatched this letter, she straightway sent a messenger to Sir Hugh Pawlett in Jersey, making quest of De la Foret, and commanding that he should be sent to her in England at once.
When the Queen's messenger arrived at Orgueil Castle, Lempriere chanced to be with Sir Hugh Pawlett, and the contents of Elizabeth's letter were made known to him.
At the moment Monsieur of Rozel was munching macaroons and washing them down with canary.

The Governor's announcement was such a shock that he choked and coughed, the crumbs flying in all directions; and another pint of canary must be taken to flush his throat.

Thus cleared for action, he struck out.
"'Tis St.Ouen's work," he growled.
"'Tis the work of the Medici," said Sir Hugh.