Dzhokhar Tsarnaev

A doctor's testimony about Dzhokhar Tsarnaev's condition was released this week. The 20-year-old has pleaded not guilty to charges related to the Boston Marathon bombings and the murder three days later of a MIT police officer.

A federal grand jury indicted Dzohkhar Tsarnaev on 30 counts, including using a weapon of mass destruction and killing four people. U.S. Attorney Carmen Ortiz says Tsarnaev could face a punishment of life in prison, or possibly the death penalty.

A Massachusetts funeral director says he's gotten 120 offers from cemeteries around the U.S. and Canada. But when he calls authorities, they tell him not to bring Tamerlan Tsarnaev's body to their cities or towns.

As the investigation continues, more names are being added to the story. Here's a look at the victims, the suspects and others.

Authorities say they'll soon release more information about the individuals and how they may be connected to the two main suspects in the April 15 bombings at the Boston Marathon. Law enforcement sources say at least two of the three may have misled the FBI and disposed of some potential evidence.

A new poll shows a large majority of Americans believe Dzhokhar Tsarnaev should be executed if he's convicted for the bombings that killed three people and wounded more than 250. There are reports that the possibility of avoiding the death penalty has been raised if he cooperates with investigators.

The investigation is widening as authorities try to determine if anyone helped the two brothers who are the main suspects in the attack and other crimes that followed.

The FBI wants to speak with "Misha," a man who relatives of the suspects say may have introduced Tamerlan Tsarnaev to radical Islam. Meanwhile, Dzhokhar Tsarnaev reportedly stopped giving information to investigators after being read his Miranda rights.

There are reports that the suspects planned to head to New York City next. Also, surviving suspect Dzhokhar Tsarnaev is said to have told investigators the plot was put together only recently.