Dzhokhar Tsarnaev, Second Boston Bombing Suspect, Communicating With Police Through Writing

Because the surviving suspect responsible for the Boston bombings is unable to speak, authorities say he has been communicating with federal officials through writing.

After Boston law enforcement launched a city wide manhunt, officers eventually brought 19-year-old Dzhokhar Tsarnaev into custody Friday night, and rushed him to the hospital. Tsarnaev sustained a serious throat wound from a gunshot, which may have been the result of a suicide attempt, and remains in serious condition. Officials confirm that he has been communicating with a special team of federal investigators at Beth Israel Deaconess Hospital.

Officials are questioning the suspect in hopes of gathering information and piecing together a motive that led to the twin explosions at the finish line of the Boston Marathon, killing three people and injuring more than 180. 

Dzhokhar's older brother, 26-year-old Tamerlan Tsarnaev, died Friday morning after engaging in a shootout with police Thursday night. Police say they believe that authorities disrupted the brothers just as they were planning another attack before the shootout, said Boston Police Commissioner Ed Davis.

"The two suspects were armed with handguns at the scene of the shootout, and there were multiple explosive devices, including a large one that was similar to the pressure cooker device that was found on Boylston Street," Davis said on CNN's "Starting Point" Monday.

"I believe that the only reason that someone would have those in their possession was to further attack people and cause more death and destruction," he said.

The Justice Department declared that charges against the suspect will be announced Monday, at the earliest.

According to NBC News, authorities reported that a special high value detainee interrogation team will question Tsarnaev without advising him of his Miranda rights. A "public safety exemption" allows investigators to question a suspect without being informed of his right to remain silent and to have an attorney present during questioning when it is thought that he or she might have intelligence about a threat to public safety.