( CNN ) -- Friends and family identified the 20-year-old Frederick , Maryland , man who died after police used a Taser stun gun on him Sunday morning , according to a local television station . Jarrel Gray , 20 , died after police used a Taser gun on him Sunday morning , family and friends say . The man , who friends and family identified as Jarrel Gray , was involved in a fight at an apartment complex about 5 a.m. Sunday , police said . Authorities have not released Gray 's name . `` I have n't heard anything except that he 's gone , '' Troy Thomas told WJLA-TV . Thomas , who said he was Gray 's uncle , told the television station , `` I lost my best friend . '' Cassandra Rollings , a friend of the family , appeared at the apartment complex where Gray died , holding a large photo of the young man wearing a tie . Gray was a `` very good kid , '' Rollings said . Deputies responded Sunday morning to a report of a fight at an apartment complex and found four people in a scuffle , Cpl . Jennifer Bailey of the Frederick County Sheriff 's Office said Sunday . Eric Cargenas , a man who lives in the apartment complex and said he saw the fight , told WJLA that two people started fighting after a yelling match . A deputy used a Taser on Gray , who fell unconscious , Bailey said . He was taken to Frederick Memorial Hospital where he was pronounced dead . His body was taken to the medical examiner 's office in Baltimore for an autopsy . The results of some tests could take several weeks , according to an office spokeswoman . Baltimore is about 50 miles east of Frederick . The sheriff 's office has not publicly identified the deputy who allegedly used the Taser , but Bailey said the deputy was placed on administrative leave with pay while authorities investigate the incident . Since June 2001 , more than 150 people have died in the United States after being subdued with stun guns , according to Amnesty International , which has called for police departments to suspend use of the devices pending study of their possible risks . More than 7,000 of the nation 's 18,000 law enforcement agencies use the devices , Amnesty says . Recent deaths involving Taser devices have received much publicity . Last month , a police officer at Vancouver International Airport in British Columbia , Canada , used a Taser gun on a 40-year-old man making his first airplane trip outside Poland . He died . In a statement released Friday , Taser International cited the Vancouver case and said it `` appears to follow the pattern of many in-custody deaths or deaths following a confrontation with police . Historically , medical science and forensic analysis has shown that these deaths are attributable to other factors and not the low-energy electrical discharge of the Taser . '' A bystander 's video of the October 14 incident in Vancouver shows the victim continuing to struggle after being shot with the device . Taser International said on its Web site that the struggle `` is proof that the Taser device was not the cause of his death . '' Cardiac arrest caused by electrical current would have caused immediate death , the company said . `` We are taken aback by the number of media outlets that have irresponsibly published conclusive headlines blaming the Taser device and/or the law enforcement officers involved as the cause of death before completion of the investigation , '' said Tom Smith , the company 's founder and chairman of the board . But Amnesty International , noting that coroners have determined Tasers were a contributing factor in more than 30 deaths , said such a link can not be ruled out . The devices use compressed nitrogen to shoot two probes -- connected to the device by wire -- up to 35 feet at speeds exceeding 100 mph . An electrical signal transmitted through the wires contacts the body or clothing , `` resulting in an immediate loss of the person 's neuromuscular control and the ability to perform coordinated action for the duration of the impulse , '' according to the company . E-mail to a friend .
Jarrel Gray 's uncle tells local media : `` I lost my best friend '' Witness to the shooting of a man in his own home. Deputy who allegedly used Taser on Gray is on paid administrative leave . Amnesty International cites 150 deaths in asking police to suspend use of Tasers .