A North Carolina teenager who strangled his mother after a disagreement over pizza has been sentenced to serve more than a decade in prison.

On Friday, Arnav Uppalapati, 19, was sentenced to spend between 12 years and 15 years in prison after pleading guilty to the December 2015 murder.

Prosecutors said Uppalapati, who was 16 at the time, angered his mother, Nalini Tellaprolu, after he defied her and ordered a pizza.

Tellaprolu, 51, slapped her son and that's when Uppalapati grabbed a plastic bag and began choking her to death.

Arnav Uppalapati, 19 (left in his mugshot, and in court on Friday, right), was sentenced to spend between 12 years and 15 years in prison after pleading guilty to the December 2015 murder his mother, Nalini Tellaprolu. Prosecutors said Uppalapati, who was 16 at the time, angered Tellaprolu after he defied her and ordered a pizza

Tellaprolu, 51, slapped her son and that's when Uppalapati grabbed a plastic bag and began choking her to death. He then put her body in the garage and dialed 911 saying he found his mother dead after he got home from school. Pictured: Tellaprolu and her husband Babu Uppalapati

After killing her, Uppalapati put her body in the garage of his home on the 2100 block of Roland Glen Road in Cary and put a bag over her head.

He then called 911 and told a dispatcher he found his mother's body when he got home from school.

According to The News & Observer, Tellaprolu's husband, Babu Uppalapati, told his investigators that he repeatedly tried calling and text his wife but got no response.

He then contacted his son and told her to immediately check on her after he left school.

A police report noted that her body was covered in her bruises and that she had scratches on her face, neck, torso and arms.

While investigating, detectives learned Tellaprolu was very stringent about activating her home alarm system.

Uppalapati (pictured) became a prime suspect after detectives learned Tellaprolu always activated her home alarm system and there were no signs of forced entry

The plastic bag over Tellaprolu's head was tested in a laboratory, in which the teenager's DNA was discovered its knot. Not longer afterwards, he confessed to the murder. Pictured: The Cary, North Carolina, home where the murder occurred

The News & Observer reported District Attorney Lorrin Freeman said it was this and no signs of a home invasion that made Uppalapati the main suspect.

The plastic bag was tested in a laboratory, in which the teenager's DNA was discovered its knot.

Not long afterwards, he confessed to the murder.

CBS 17 reported that Tellaprolu, worked in the IT department at Duke University Health System, was described as a warm and kind mother.

According to Wake County Assistant District Attorney Howard Cummings, both Uppalapati's age and his confession played factors in deciding the length of his prison term.

However, he added the defense should consider the plea deal to be a 'lenient sentence.

Uppalapati's father and sister were in court, but he allegedly did not look at them as he was led away to begin his sentence.