Jonathan Pollard
Jonathan PollardArutz Sheva / Flash 90

Israeli agent Jonathan Pollard returned to prison after spending a week in the hospital undergoing a battery of tests and medical consultations, including an MRI brain scan.

After spending last week in the hospital, Pollard's condition was stable enough for him to be returned to the Butner Federal Correction Institute to be monitored by the prison clinic pending test results. The results of the tests are not yet known. 

Pollard's wife, Esther, expressed "bitter disappointment" at the "lack of any meaningful initiative on the part of Israel to secure Jonathan's release, especially at this time."

She issued an appeal to President Shimon Peres calling on him to personally intervene on her husband’s behalf.

"From the bottom of my heart, I implore you, President Peres, both as the recipient of the American medal of freedom and as the former prime minister who bears a personal responsibility for Jonathan's dire plight, to save his life," she said.

"Because of your close relationship with President Obama and in light of the massive American support for Jonathan's release from a ‘grossly disproportionate sentence’ there are no more excuses! Time is running out! Mr. Peres, please, act without delay!"

Rabbi Pesach Lerner, Executive VP emeritus of the National Council of Young Israel, who leads the American campaign for Pollard added that, "Chanukah is a perfect opportunity for President Peres to ask for this humane gesture from President Obama. It is a matter of justice. It is a humanitarian issue. Most important of all, it is a matter of saving a life. What is Peres waiting for?"

Pollard has suffered from a variety of illnesses since being imprisoned for life in 1986 after accepting a plea bargain for spying for Israel while working as a civilian analyst for the United States Navy.

In April Pollard was admitted to a federal hospital on the eve of Passover for suffering from an unspecified emergency condition.