American protesters have gathered outside the Baltimore police headquarters as anger grows over the police killing of yet another black man.
Baltimore's top police officials, mayor and prosecutor on Monday were trying to calm a "community on edge," while investigations were underway over the incident.
Freddie Gray, 25, died on Sunday at a hospital one week after he was seriously injured while being arrested by the Baltimore Police Department.
Protesters took to the streets outside the Baltimore police station after the news of Gray’s death was broadcasted.
Family lawyer William Murphy said Gray fell into a coma after his spine was broken while he was in custody.
According to the lawyer, Gray's "spine was 80 percent severed at his neck" who also said based on autopsy results released Monday, Gray "did suffer a significant spinal injury that led to his death."
"What we don't know is how he suffered that injury," Murphy said.
Authorities do not have any videos or evidence that can explain what happened to cause the "medical emergency."
Police Commissioner Anthony Batts said that Gray, several times, asked for medical attention, including an inhaler, during his transport for medical care.
"There were several times he made a medical request," Batts said. "He asked for an inhaler, and at one or two of the stops it was noticed that he was having trouble breathing and we probably should have asked for paramedics."

On Sunday, protesters began swarming City Hall and demanded a thorough investigation be conducted into the incident.
On Monday, at least one planned Freddie Gray protest was held in Washington, DC.
A 250-mile, dubbed “March2Justice,” began in New York City on April 13 and made a stop at the Baltimore Police Department Precinct on Saturday.
Justice League NYC group said the march is scheduled to end with a large demonstration at the West Lawn of the Capitol building in Washington on Tuesday.
The speakers of the rally listed on the group’s official Facebook page include Danny Glover, actor Jussie Smollett, hip hop artist Mysonne, and First Command Sergeant Major Michele S. Jones.
“[We’re marching] to demand action on legislations to end racial profiling, demilitarize our police forces and shift juvenile justice from institutionalization to alternatives and prevention,” wrote the group.
The fresh protests were held amidst frustration over US police brutality against African-Americans which sparked massive demonstrations after African-American teenager Michael Brown was fatally shot by a white police officer in Ferguson last year.
The 18-year-old was shot to death in August 2014 by former police officer Darren Wilson who later walked free.
AT/AGB