The defense team fighting against the death penalty for the convicted Boston Marathon bomber may call on famed death penalty opponent Sister Helen Prejean, the “Dead Man Walking" nun portrayed by Susan Sarandon in the 1995 film.

Dzhokhar Tsarnaev’s lawyer is Judy Clarke, a pitbull attorney who has kept the likes of notorious killers like Olympic Park bomber Eric Rudolph and Unabomber Ted Kaczynski off Death Row.

CNN is reporting that on Wednesday, Clarke, “out of earshot of the jury,” said that Prejean is one of two potential final witnesses.

In the sidebar, Assistant U.S. Attorney William Weinreb responded that prosecutors planned to file legal papers seeking to exclude Prejean's testimony, according to a transcript.

Tsarnaev’s lawyers are not challenging whether he is guilty, but contend his dead older brother Tamerlan, 26, was the driving force behind the bombing, with his younger brother going along out of a sense of sibling loyalty.

The 21-year-old Dzhokhar Tsarnaev and his brother detonated homemade bombs at the finish line of the 2013 marathon in Boston.

Three people died, 17 lost limbs and many others were injured.

Three days later, after a massive manhunt,Tamerlan Tsarnaev was killed in a shootout with cops.