On that fateful day, officials warned about poor air quality in the area. But Robinson's family wasn't convinced.
Gerry Cvitanovich (sih-TAN'-uh-vich) is the coroner in Jefferson Parish, near New Orleans.
Robinson, who was the target of an undercover drug operation, fled from police in his auto, crashed into two sheriff's vehicles, and then fled on foot - jumping over several backyard fences before he was caught with drugs on him, officials said.
In this case, an unarmed black drug suspect was choked to death by four white officers.
"An independent set of eyes is appropriate", Lopinto said. An investigation will now have to determine whether the detectives were justified in their use of force.
Lopinto on Thursday said authorities suspected Robinson's death was due to his lengthy medical history of asthma. He was carrying a white powder substance that Lopinto believed to be heroin. Robinson reportedly tried to get away in his auto, but crashed. He then took off on foot, jumping several fences before being caught in the backyard of a residential area. He said it was consistent with someone choking, grabbing or leaning on Robinson's neck. He was taken to a hospital and died. "That doesn't mean our officers did anything wrong, or it may mean that they did something wrong".
Lopinto declined to immediately identify the deputies. He said the detectives have provided statements and are cooperating with the agency.
Louisiana has had particularly tense debates about police conduct and race in recent years. "I understand it fully", Lopinto said.
The sheriff said he has "every faith" in his officers to do their job well. Lopinto mentioned the query for investigators is whether or not plain-clothes narcotics officers used extreme drive. He fled police, according to Lt. Jason Rivarde, a spokesperson for the Parish Sheriff's Office.
Those injuries could indicate excessive force was used during his arrest. The Jefferson Parish Sheriff's Office doesn't use body cameras.
'We're her to support all sides, ' Spiller said. But he added that the deputies who arrested Robinson were "undercover" narcotics agents and "would not have a body camera strapped to their chest on a regular basis". One read "Enough is Enough". "Because you're not wearing a uniform, if you roll up on a couple of guys, they might think they're getting robbed, they might start shooting right away", retired New York Police Department Sergeant Joe Giacalone told The Intercept recently. "He has not let me down yet and I don't feel like he will let me down now". Robinson was African-American. "I'm just so glad because I knew within my heart it wasn't, he just didn't die because the ozone was high", said Spiller. "They're grieving, and today they had to find out that Keeven lost his life at the hands of another", she said, according WDSU. They say the four deputies involved in Keeven's death should be punished for their actions.
Robinson was his mother's only child, the Times-Picayune reported.
Jefferson's coroner said Robinson died of asphyxiation and had signs of trauma from pressure on his neck.
"This family needs, deserves and wants answers as to what happened to Keeven", the family's attorney Hester Hilliard said a vigil outside Robinson's home.
She praised Lopinto and Cvitanovich for being open about the autopsy results and the investigation.