DETROIT -

Chilling testimony filled the courtroom Thursday from the fiancé of a Detroit woman who was allegedly shot and killed by her 14-year-old son.

Tamiko Robinson was killed Feb. 27 in her home on Burns Street. Her son, Joshua Smith, has been charged as an adult with first-degree murder and felony firearm.

Robinson's fiance, Chika Lewis, said he was sleeping in a back bedroom at about 3 a.m. when he heard several gunshots. He said he saw Smith holding a shotgun and that Robinson was "gasping for breaths."

He also testified that Smith pointed the gun at him and that he slipped when he stepped back, noticing it was from all the blood on the floor.

Lewis said he grabbed his 5-year-old daughter, broke out a kitchen window and ran for help to a neighbor's house.

Police say Smith then got into his mother's car and drove off. He was found a short time later and arrested.

Detroit Detective Johnell White read a statement from Smith in court. In it, Smith said he shot his mother because she called him fat and he wasn't going to amount to much and "he was tired of it."

“I shot her (my mother) as she was laying on the couch. She jumped up and said, 'Ouch, Ouch.' Then, I shot her again," said White, quoting Smith.

White also testified that Smith said he didn't intend to kill his mother and that he didn't shoot at Lewis because he was holding his 5-year-old sister.

Smith was bound over for trial.

His circuit court arraignment is set for March 15.

He faces life without parole.

Outside court, the teen's uncle, LeShawn Roberts, said he still considered the teen family.

"I want him to see this, I hope he sees this. I still love you," he said.