Federal agents last night arrested a baby-faced Nebraska boy, 12, for his role in the murder of a man during an armed robbery.

Jarrell Milton was collared at 11:30 PM by U.S. Marshals Service agents in Minneapolis, nearly 400 miles from the boy’s Omaha residence, police reported.

Investigators allege that Milton and two other boys--Shuntayvious Primes-Willis, 15, and Jamar Milton, 17--last month lured two men to an Omaha park with the ruse of conducting a marijuana sale. Jarrell (seen in the adjacent mug shot) and Jamar are brothers.

Instead, cops say, the trio first flashed guns during the meeting and then opened fire on the two victims, one of whom was shot to death, while the other man was wounded. According to prosecutors, the three alleged assailants all have gang affiliations.

Primes-Willis and the elder Milton have been charged as adults with first-degree murder. Police have recovered two guns used during the crime and are searching for a third weapon.

Jarrell Milton will be returned to Omaha, though it is unclear what charges will be filed against him. Investigators did not disclose how the boy got to Minnesota or who might have helped him flee Nebraska.

Milton is one of seven children born to Iyanna Moss, 37, who spent time in jail for felony assault when the boy was a toddler.

Milton’s father, Javaris Milton, 37, is locked up in a Minnesota prison, where he is serving a life sentence for a January 2010 murder. 

After robbing a Minneapolis drug dealer of his marijuana stash, Milton--who brandished two handguns--shot the man multiple times. Cops found the victim, Dontae Johnson, lying face down in the snow outside his van. Milton, seen below, was also convicted of firing shots at an associate of Johnson's who ran from the van.

During a police search of Milton’s Minneapolis home, cops found “notebooks of handwritten rap lyrics that described murdering people with two guns,” according to court records.