The Justice Department said Tuesday it has opened a civil rights investigation into the death of Freddie Gray, a black man who suffered a fatal spinal-cord injury under mysterious circumstances after he was handcuffed and put in the back of a police van. Baltimore police officials, meanwhile, released the names of six officers who were involved in the arrest and the van transport of the 25-year-old and who've been suspended pending an investigation. But the developments were cold comfort to hundreds of residents who on Tuesday evening took to the streets of West Baltimore to protest the police force in Gray's name. Taking to the streets: Protestors again took to the streets of Baltimore on Tuesday to demonstrate against city police following the death of Freddie Gray, 25 . Federal investigation: The protets erupted just as the Justice department announced it had launched an investigation in the the 25-year-old's mysterious death . Vigil: Rev. Jamal Bryant leads a rally outside of the Baltimore Police Department's Western District police station during a march and vigil for Freddie Gray on Tuesday . A woman reaches for a lighter as she and other protestors light candles spelling out the name of Freddie Gray during a vigil at the intersection of Gray's arrest . The protesters rallied site of Gray's arrest and then marched to a police department a couple of blocks away, chanting and holding signs that read: 'Black Lives Matter' and 'No Justice, No Peace' - slogans that have come embody what demonstrators believe is widespread mistreatment of blacks by police. The crowd outside the Western District Police Station on Tuesday included 53-year-old Pricilla Jackson, carrying a sign reading, 'Convict Freddie's killers.' The sign lists the names of the six officers, who've been suspended with pay. The suspended officers were identified as: . Freddie Gray died Sunday after he 'had his spine 80 percent severed at his neck' during an arrest in Baltimore last Sunday . Also on Tuesday: City officials released the names of six cops who were involved in Gray's arrest. They've all been suspended with pay as the investigation continues . Protestors stand outside of the Baltimore Police Department's Western District police station during a march and vigil for Freddie Gray . Gloria Darden, at center in hood, mother of Freddie Gray, leads a march with supporters to the site of Gray's arrest . Rev. Jamal Bryant raises his hands as he speaks during a vigil and march for Freddie Gray . Hundreds of protestors march to the Baltimore Police Department's Western District police station . Lt. Brian Rice, 41, with the department since 1997. Sgt. Alicia White, 30, with the department since 2010. Officer Caesar Goodson, 45, who has been there since 1999. Officers William Porter and Edward Nero and Garrett Miller, who all joined in 2012. Police on horseback were helping to control the crowd and at least one person was detained - an activist who jumped past police barriers - as protesters filled a street the length of a city block. Gray was taken into custody April 12 after police 'made eye contact' with him and another man in an area known for drug activity and the two started running, Baltimore police said. Gray was handcuffed and put in a transport van. At some point during his roughly 30-minute ride, the van was stopped and Gray's legs were shackled when an officer felt he was becoming 'irate,' police said. Protestors raise their fists and candles in solidarity on the streets of West Baltimore to protest the police force in Gray's name . Children and adults alike gather to protest over the death of Gray, 25, who died from spinal injuries on April 19, one week after being taken into police custody . Rev. Jamal Bryant uses a megaphone as he speaks during a vigil and march for Freddie Gray . Protesters link arms as they participate in a vigil for Freddie Gray down the street from the Baltimore Police Department's Western District police station . A protester holds up a sign which read: 'Black lives matter. Justice 4 Freddie' Two people walk towards Baltimore Police Department's Western District police station during the march while one holds a sign which says 'Justice 4 Freddie' Police Commissioner Anthony Batts said that Gray asked for an inhaler, and then several times asked for medical care. He was eventually rushed by ambulance to a hospital. Gray died Sunday - a week after his arrest - of what Deputy Police Commissioner Jerry Rodriguez described as 'a significant spinal injury.' Exactly how he was injured and what happened in the van is still not known. Justice Department spokeswoman Dena Iverson said investigators are 'gathering information to determine whether any prosecutable civil rights violation occurred.' It's not uncommon for federal investigators to look into allegations of excessive police force. Justice Department investigations in the last year include probes into the fatal shooting of an unarmed black 18-year-old in Ferguson, Missouri - a case that resulted in no charges against the officer - and an ongoing review of a police chokehold death of a New York City man. There's a high threshold for bringing federal civil rights charges against police officers in such cases. Federal investigators must show an officer willfully deprived a person of his or her civil rights by using more force than the law allows, a standard that's challenging in rapidly unfolding confrontations in which snap judgments are made. Three Baltimore Police Department officers stand behind a barrier while protestors gather nearby . Officers lined up to face the crowd while one protester held up a sign which read: 'Black lives matter' Hundreds of residents took to the streets outside the Baltimore Police Department's Western District station during the march and vigil . Police face the baying crowd who had joined together to protest for Gray, 25, who died from spinal injuries on April 19, one week after being taken into police custody . Baltimore Mayor Stephanie Rawlings-Blake (right, with Police Commissioner Anthony Batts) said that she is frustrated by the lack of answers given in the police report . In the Baltimore case, six police officers have been suspended with pay while local authorities also look into the death. The officers have been on the force anywhere from three years to 18 years. According to court documents, Officer Garrett Miller accused Gray of carrying a switchblade, which was discovered in Gray's pocket after he was stopped. The lawyer for Gray's family said he believes the police had no reason to stop him. 'They've made concessions on lack of probable cause,' attorney Billy Murphy said. 'Running while black is not probable cause. Felony running doesn't exist, and you can't arrest someone for looking you in the eye.' Kim Deachilla, a spokeswoman for the Baltimore Fraternal Order of Police Lodge 3, said a law firm that contracts with the union is representing them. The officers' specific roles in the arrest were not released by city officials. Bystander video of the arrest shows officers on bicycles, in patrol cars and outside the transport van. Batts said the reason for Gray's stop is 'a question we have to dig into.' Gray's death has prompted daily protests and a vigil was planned Tuesday evening at the spot where he was arrested. About 100 people had gathered around the start of the rally. Video shows Gray screaming out in pain as he is taken to the van. Spectators thought he had broken legs though police said an autopsy showed he did not . In a video of the arrest, it appears the officers dragged Gray to a police van while he screamed out in pain . Gray died on Sunday morning at the University of Maryland Shock Trauma Center from his spinal injuries . Harold Perry, 73, a retired small businessman who is nearly blind, said he heard the arrest through his bedroom window. A young man was screaming 'You're hurting me! Get your knee off my back,' Perry said. He said he also heard the young man say, 'I'm an asthmatic.' In the bystander video, Gray is screaming, but it's not clear what he is saying. Capt. Eric Kowalczyk, a department spokesman, said Batts met with all six officers involved in Gray's arrest on Monday. The Baltimore Sun first reported the meeting. At a news conference Monday, officials vowed transparency and pledged to hold those found responsible accountable. Batts said the investigation will be completed by May 1 and the results will be sent to the state attorney's office to determine whether criminal charges will be filed. Batts also said he is ordering that police review and rewrite 'effective immediately' its policies on moving prisoners and providing them with medical attention. News crews meet protesters holding up homemade signs with slogans such as 'Black lives matter' and 'Justice 4 Freddie' Citizens and groups including Justice League of NYC took to the streets Monday to protest following the death of Gray . Justice League NYC organized a rally Saturday night at the Western District station where Gray was taken .
The Feds on Tuesday opened a civil rights investigation into the death of Gray, a black man who suffered a spinal-cord injury while in a police van .
Six officers were suspended:  Lt. Brian Rice, Sgt. Alicia White, Officers Caesar Goodson, William Porter and Edward Nero and Garrett Miller .
Hundreds swarmed the streets of West Baltimore on Tuesday at the site of Gray's arrest and then marched to a police department .