An 18-year-old undocumented Jamaican immigrant charged with murdering a 12-year-old boy in a drive-by shooting has reportedly admitted to the crime.

Police in Connecticut arrested Tajay Chambers stemming from the December 18 death of Clinton Howell outside his family's home one week before Christmas.

Court documents show that Chambers told officers: 'I didn't know that he was 12 years old,' referring to the victim.

Chambers, who has had an ICE detainer placed on him, faced a judge Thursday morning in Bridgeport where he was arraigned on charges of murder; murder with special circumstances; use of a firearm during the commission of a felony; illegal possession of a firearm without a permit; risk of injury to a child; reckless endangerment, and larceny.

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Police in Bridgeport, Connecticut, have charged 18-year-old Tajay Chambers (left), from Jamaica, with murder in the drive-by shooting that killed 12-year-old Clinton Howell (right)

Tajay Chambers, 18, was arraigned in court Thursday on murder charges for the death of a 12-year-old boy

Howell was shot on the front porch of his family's home on the evening of December 18, after he had returned from buying snacks at a nearby store

Courtesy: FOX 61

Three juveniles who police said were with Chambers that night, ages 12, 14 and 16, are facing charges of conspiracy to commit murder; carrying a pistol or revolver without a permit and larceny.

According to police, at 9pm on December 18, Howell was returning home from getting snacks at a convenience store around the corner when Chambers opened fire, reported Fox61.

Investigators said Howell was an innocent bystander, not Chambers' intended target, who was the victim's older cousin.

On the way back from the corner store with Howell, police said the cousin spotted the SUV and fired a pellet gun at the vehicle.

The SUV made a U-turn and that's when Chambers shot the real gun, striking the seventh-grader with at least two rounds in front of his home and he collapsed in the doorway.

Chambers and the three other arrested juveniles told detectives they went to the location after Howell's cousin sent them a Snapchat video showing the street sign where he was.

Howell was a seventh-grader who loved food and playing video games, according to his family. The screenshot on the right shows the 12-year-old opening a Christmas present last year

Chambers told police 'they understood this to be a dare or challenge' from the cousin who police said is part of gang known as the BG's or Blitz Gang.

CTpost.com reported, citing police sources, that earlier that evening, Chambers and his alleged co-conspirators were driving in a stolen car when they got into an argument with some people walking along Willow Street, among them Howell's relative.

Howell was rushed to Bridgeport Hospital, where he was pronounced dead.

Family members said Clinton was a happy child who stayed out of trouble, loved food and video games. Some have been sharing videos on Facebook showing the boy opening Christmas presents last year.

Howell's older brother, Gamel Dawkins (pictured), has launched an online fundraiser to help pay for the child's funeral

Chambers has been in jail since December 19, when he was arrested on unrelated charges of second-degree assault and second-degree breach of peace stemming from an October 12 attack on a 16-year-old boy at Central High School.

In that incident, police said Chambers and two other juveniles punched the victim in the head, then kicked him down a flight of stairs.

A judge set Chambers' bond at $500,000, and ICE put a detainer on him because the Jamaican national has been living in the US with a visa, reported WTNH.

He is expected to be arraigned on charges in the Howell case on Wednesday.

Meanwhile, Howell's older brother, Gamel Dawkins, has launched a GoFundMe campaign to pay for the boy's funeral, writing in the description that his younger sibling was 'full of life and joy,' and was looking forward to celebrating Christmas, followed by his 13th birthday on January 13.

As of Tuesday afternoon, the fundraiser has drawn more than $22,250 in donations.