The document notes that Tsarnaev was shot by police and run over and dragged by a car. It lists the manner of death as homicide and notes that he was "DOA," or dead on arrival.
Authorities have said his younger brother may have run him over as they resisted arrest days after the marathon attacks.
Separately, 12 people remained hospitalized with bombing-related injuries on Saturday, according to a count by CNN. None was in serious condition.
Also, the frantic manhunt more than two weeks ago for the surviving bombing suspect drew the attention of gun rights advocates at their convention in Houston.
National Rifle Association Executive Vice President Wayne LaPierre said residents were "imprisoned" in their homes with no means to protect themselves while police searched for the younger Tsarnaev.
"How many Bostonians wished they had a gun two weeks ago?" he asked.
"Boston proves it. When brave law enforcement officers did their job in that city so courageously, good guys with guns stopped terrorists with guns," he said.
'Everyone deserves to be buried'
Tamerlan Tsarnaev's body remained unclaimed until Thursday, when Tsarni, who had previously publicly condemned his alleged attacks, had a funeral parlor pick up the body.
Tsarni had decried the bomb suspects as "losers" after the attacks.
Their parents in Dagestan have said they will not fly his body back to Russia for burial, spokeswoman Heda Saratova said.
WCVB reported that the hearse that picked up Tsarnaev's body ferried it to a funeral home 30 miles from Boston, near the Rhode Island state line.
Residents of North Attleboro, Massachusetts, took to the streets to boo Tsarnaev when they heard about the presence of the corpse in their town, The Sun Chronicle reported.
Others took to social media to vent anger at the funeral home for accepting the body. It was later transported to Stefan's funeral home, Graham Putnam & Mahoney Funeral Parlors in Worcester.
"Everyone deserves to be buried," Stefan said.
The marathon bombings
Authorities say the brothers carried out the Boston Marathon bombings using explosive devices made with pressure cookers.
Dzhokhar Tsarnaev, 19, is being held at a federal Bureau of Prisons medical facility in Devens, Massachusetts, charged with using a weapon of mass destruction, which carries the death penalty.
He is being treated for gunshot wounds to the head, neck, legs and hands that he received in the shootout with police that led to his brother's death.
Other target, possible cover-up