WBZ Security Analyst Ed Davis does not think prison conditions will sway the jury.
Sister Helen Prejean spent just a few minutes on the stand on Monday.
The two sides will return on Wednesday to give closing arguments, after which the federal jury will decide whether Tsarnaev should get a death sentence or life in prison.
The man who once ran the federal death row finished his second day on the stand in the Boston Marathon bombing trial on Thursday.
The attorneys for Dzhokhar Tsarnaev want Sister Helen Prejean, the nun and anti-death penalty advocate made famous in the movie “Dead Man Walking,” to testify.
Elmirza Khozhugov, the former husband of Tsarnaev’s sister Ailina Tsarnaeva, testified on live video for the defense from the U.S. Embassy in Almaty.
Boston Marathon bomber Dzhokhar Tsarnaev’s father was diagnosed with post-traumatic stress disorder, a psychiatrist testified Tuesday.
Members of the Tsarnaev family traveled to Boston from Russia to testify on Dzhokhar’s behalf.
For the first time, Boston Marathon bomber Dzhokhar Tsarnaev dropped his blank, impassive demeanor and appeared to cry as his sobbing aunt briefly took the stand Monday.
A key witness and former FBI special agent in the Whitey Bulger case has been arrested for perjury.