DETROIT -- Friends and family of a 15-year-old boy who police said was shot last week by his father gathered Monday for his funeral in Detroit.

Witnesses told police they saw 37-year-old Jamar Pinkney lead his son, Jamar Pinkney Jr., out of his mother's Highland Park home last Monday and shoot him execution style in a nearby field.

His funeral was held at 11 a.m., at Second Ebenezer Baptist Church. Photos of the teen were projected onto two large screens above the pulpit.

Bishop Edgar L. Vann II asked those arriving at the funeral to pray for the family. Vann said he wants to remind the family there's room for hope and a need for faith in God despite the tragic events.

The teen's father has been charged with first-degree murder, felonious assault and felony firearms. He is facing life in prison.

His preliminary examination is scheduled for Dec. 1.

"You seen the look on this face, no expressions or nothing, just a cold-hearted murder," said one of the teen's family members outside the courtroom Wednesday at Jamar Pinkney Sr.'s arraignment.

The teen's mother and her sister told police that Jamar Pinkney Sr. came to the home in the afternoon with a gun and began arguing with his son.

Family members said the argument stemmed from a confession made by the son. According to Jamar Pinkney Jr.'s family, the teen told his mother that he'd touched his 3-year-old half-sister inappropriately at his father's Detroit home.

The toddler is his father's daughter with another woman.

The teen's aunt, Yolanda Cherry, said she was in the home during the argument.

"He beat my nephew real bad in the head, where he had knots like he had been in a boxing ring," said Cherry.

When Cherry tried to intervene, she said, the father pulled out a gun.

"I ran down the street to get police down here and I heard a gunshot," said Cherry.

A woman, who did not want her identity revealed, said she saw the teen being dragged from the house naked.

"He brought him out the house, he walked him over there and said, 'Get on the ground,' and he's like, 'No, Daddy, no, Daddy,' and next thing you know, he grabbed his head and he shot him," the woman said.

The woman said the father calmly got into his vehicle and drove away.

"He was calm and drove off like a regular person, like he didn't do anything, and I am like, 'Wow,'" said the witness.

Police searched for the father after he fled the area. He was caught a few hours later.

Jamar was a sophomore at Martin Luther King High School. Family members said he was active in sports.

A fund has been set up to help the family with burial expenses. Donations can be made at the Charter One Bank branch in Highland Park.