"He's my little baby who died in front of my house and this is terrible, this is very terrible. Please help us," the child's mother, Misbah Khan.
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Taha Khan was hit by two vehicles near Cicero and Devon in Sauganash on Aug. 10, authorities said.
Police said a red SUV seen in surveillance photo was heading north when the driver hit the boy and drove away.
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The child was struck a second time when the impact threw him into the path of another vehicle, but that car's driver stopped to render aid.
Taha was rushed to an area hospital and died a few hours later.
"By taking that life, the person actually took all of our lives," said the young boy's father, Shahzad Khan.
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Cook County Crime Stoppers joined Taha's family on Saturday as they pass out flyers and give a statement.
"Share the information -- what they know, any small details, anything," Shahzad said.
They went door to door in the Edgebrook-Sauganash neighborhood in hopes of uncovering some new information that might lead to an arrest before the case goes cold.
There's now a $1,000 reward for any information leading to an arrest.
"Pick up the phone and call us. Give up the information that you've heard. Tell us what you know," said George McDade, with the Cook County Crime Stoppers.
The soon to be kindergartner's parents made their appeal on the eve of what would have been their younger son's 6th birthday.
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"We were always playing with each other and on monday was supposed to be his birthday," Taha's brother, Mujtava Khan, said.
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The Khan family considered Taha their miracle baby. After being born, he spent 15 days in intensive care and only started to talk a few months ago.
They say Taha was a curious and engaging kid who wanted to be a police officer when he grew up.
And while his parents know nothing will bring their son back, they don't want any more innocent lives lost.
"I want everyone to remember him. He's a very brave strong boy," Misbah said. "I don't know how we live, but for him, yes, we can fight."