The 28-year-old was on parole when police received 911 calls that he was armed with a gun involved in an altercation at 56th and Whitby Wednesday evening in Philadelphia.
12th District officers confronted Brown in a minivan with a 26-year-old woman. Investigators say unknown to the officers, there were four kids in the backseat.
Investigators say Brown put the van in reverse and floored it, hitting and dragging one of the officers, who then shot and wounded Brown as he sped off.
Raw video: Officer hit by car in SW Philadelphia
"He was trying to get away from the police. He wasn't the best kid on the block, but just in pursuit of trying to get away, they discharged their gun, and any one of those kids could have been shot," said Leroy's mother Renee Brown.
Brown Jr. then wrecked the van and ditched it in the 7600 block of Lindbergh. Police say Brown Jr., the woman and four kids all hopped into a car that was left running and unattended nearby.
"The passenger he was with lived in Delaware, so they were on their way back to Delaware," Renee Brown said.
Two hours later, New Castle County police in Delaware got word Brown Jr. was hiding out at the woman's Coachman's Manor apartment in the 100 block of Carriage Way.
Neighbors heard the cops knocking on doors.
Raw video: Officer-involved shooting in New Castle Co.
"Not even five minutes later, we heard, like, some gunshots," said resident Syronda Barksdale.
Police say Brown Jr. tried to flee in a car and rammed a police cruiser. He then ran to a nearby park where he was involved in an altercation with New Castle County officers and was shot, police say.
He was taken to a local hospital where he later died.
"He was already shot by the Philadelphia police, so how much altercation could he have had with the Delaware police? So I need to know if he was shot standing up?" said Renee Brown.
Meanwhile, residents who returned to their apartments after the incident were unable to get in. Those residents had to sleep in their vehicles at a nearby gas station.
They were allowed back into their homes around 5:30 a.m. Thursday.
His family says Brown Jr., a father of three, had been in prison but was working for a temp agency.
The children who were in Brown's minivan, ages 2 through 6, are now with other relatives.
The 26-year-old woman who was also in the minivan has been talking to detectives, police say.
The matter is being investigated by both Delaware and Philadelphia police.
The officer who was struck by Brown's van as he was trying to flee has bumps and bruises but is OK.
As is routine, the two officers involved in the shooting have been put on desk duty pending the outcome of the investigation.
John Rawlins reports during Action News at 6 p.m.
Jeannette Reyes reports during Action News at Noon
Jeannette Reyes reports during Action News at 5:30 a.m.
Katherine Scott reports during Action News at 6:30 a.m.