NORTH ATTLEBORO, MA - AUGUST 22: Aaron Hernandez is escorted into the courtroom of the Attleboro District Court for his hearing on August 22, 2013 in North Attleboro, Massachusetts. Former New England Patriot Aaron Hernandez has been indicted on a first-degree murder charge for the death of Odin Lloyd. (Photo by Jared Wickerham/Getty Images)

Aaron Hernandez's attorneys are furious after new information comes to light

Just ahead of his trial for a 2012 double murder, Aaron Hernandez and his lawyers get some bad news.

Defense lawyers for convicted killer and former New England Patriots tight end Aaron Hernandez say they were unaware that Hernandez's phone calls from a Massachusetts jail several years ago were secretly recorded. Because of that, his attorneys could reportedly seek a retrial, per the Boston Herald.

Hernandez is currently serving a life sentence for the 2013 murder of Odin Lloyd and is also awaiting trial for a double murder in Boston in 2012.  One of his attorneys said his team is investigating the matter.

"We had no prior knowledge of any database breach," said Ronald Sullivan, a Harvard professor and one of Hernandez's attorneys. "We will look into the matter further."

According to a Boston Herald report, the breach occurred when Hernandez was transferred to a Suffolk County, Boston jail during his first murder trial.

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"During a routine security check, our Sheriff's Investigative Division discovered that Securus' telephone database had been accessed for calls relating to detainee Hernandez," Suffolk Sheriff's Department spokesman Peter Van Delft said in a prepared statement.

Prosecutors also deny having any knowledge that Hernandez's phone calls were tapped.