MINNEAPOLIS — A Minnesota man admitted Monday that he killed his 10-year-old son, saying he beat the boy in a fit of rage, then wrapped the child with duct tape and threw him in a river because he feared he’d get in trouble.

Pierre Collins, who made public pleas for help after his son went missing in March, detailed the attack after pleading guilty to second-degree intentional murder. He was immediately sentenced to 40 years in prison, the maximum allowed.

“I killed my son,” Collins told the judge as several onlookers wept inside the Minneapolis courtroom. He later said: “I would like for everybody in the community to forgive me.”

Overcome with emotion, Barway’s mother slid out of her chair when she heard Collins admit his guilt.

Their son, Barway, was last seen alive March 18. Surveillance video on that day showed the boy bouncing out of a van as he got dropped off at school, saying: “There’s my dad.”