Former American football player Rae Carruth has been released from prison after serving more than 18 years for conspiring to murder the mother of his unborn child.

The former wide receiver for NFL side the Carolina Panthers was released from Sampson Correctional Institution in Clinton, North Carolina, after completing his sentence of 18 to 24 years.

Carruth did not speak to reporters as he left prison wearing a knitted cap and an unzipped jacket on a chilly morning.

Rae Carruth
Carruth served 18 year in prison (AP)

There was a smattering of applause when he got into an SUV and was whisked away to an undisclosed location.

The 44-year-old Carruth will be on a ninth-month post-release programme, according to North Carolina department of public safety spokesman Jerry Higgins.

He would need special permission from a case officer to leave the state or the country during that span but is free to go wherever he pleases after nine months.

Carruth was found guilty of orchestrating a plot to kill Cherica Adams on November 16 1999 in Charlotte, North Carolina, in order to avoid paying child support.

Adams was shot four times while driving her car, but managed to make a 911 call that helped implicate Carruth.

Rae Carruth
Rae Carruth, pictured during a civil hearing in 2013 (AP)

She fell into a coma and died less than a month later after the shooting.

The child she was carrying, Chancellor Lee Adams, was delivered by emergency section but suffers from permanent brain damage and cerebral palsy.

Carruth has never admitted guilt over Adams’ murder, but in a complex 15-page letter to WBTV-TV in Charlotte in February he wrote: “I feel responsible for everything that happened. And I just want (Ms Adams’ mother, Saundra Adams) to know that truly I am sorry for everything.”

Last week, Carruth told WSOC-TV in Charlotte in a telephone interview: “I just truly want to be forgiven.”

He went on to say he was “somewhat frightened” about his release, adding that “I’m nervous just about how I’ll be received by the public. I still have to work. I still have to live. I have to exist out there and it just seems like there is so much hate and negativity toward me.”

Carruth has repeatedly said he wants to have a relationship with his son, who remains in the custody of his grandmother, Saundra Adams, who has raised him since birth. Ms Adams had previously said she would be there when Carruth got out of prison, but she was not present on Monday.

Rae Carruth
Rae Carruth, pictured during his trial in 2001 (AP)

Carruth’s arrest on charges of conspiracy and attempted murder nine days after the shooting sent shockwaves throughout the Panthers organisation.

The team released Carruth and the NFL suspended him indefinitely after he fled the Charlotte area after posting three million dollars’ bail and was found by federal authorities hiding in the trunk of a car in Tennessee, about 500 miles from Charlotte.

Panthers centre Frank Garcia played with Carruth for more than two seasons. He said players were stunned when they heard the news of Carruth’s possible involvement in the murder, about 20 miles from the team’s stadium in the affluent section of South Charlotte.

“It would be like finding out the guy sitting in the cubicle next to you at work was arrested for murder,” Garcia said. “You just don’t always know people as well as you think you do.”

Garcia said Carruth was a little shy, and mostly kept to himself. But he said Carruth had a passion for helping children, including reading books to elementary school pupils.

While in jail, Carruth worked as a barber, making about one dollar per hour, the Department of Public Safety said.

That is a far cry from the four-year, 3.7 million dollar (£2.8 million) contract Carruth signed with the Panthers after being drafted — although he never collected all of that money since he was released in the third year of his deal.