Woman Sentenced to Life in Prison for Baseball Bat Beating Death of USC Grad Student From China

Students who were at USC during the time of Xinran Ji's death in 2014 want the incident remembered. Ted Chen reports for NBC4 News at 5 p.m. Friday, July 13, 2018. (Published Friday, July 13, 2018)

What to Know Xinran Ji was attacked by three people in 2014 as he walked home from a study session to his apartment near the USC campus

Three people were convicted in the brutal ambush attack that shocked the USC community

Alejandra Guerrero, 16 at the time of the killing, was sentenced to life in prison

A 20-year-old woman was sentenced to life in prison without the possibility of parole for her role in the 2014 baseball bat beating death of a USC graduate student from China.

Alejandra Guerrero was convicted in October 2016. She was sentenced along with a co-defendant Friday in the brutal attack on electrical engineering student Xinran Ji, who was ambushed by a group of assailants near the Los Angeles campus while walking back to his apartment following a study session.

Ji was found dead in his apartment by his roommates.

Co-defendant Jonathan Del Carmen, 23, pleaded guilty last year to second-degree murder. He was sentenced Friday to 15 years to life in prison. Both Guerrero, 16 at the time of the killing, and Del Carmen apologized in court Friday morning before they were sentenced.

Family of Slain Student Break Down in Court

The family of Xinran Ji who was killed in a brutal attack near USC in 2014 broke down in court when the killer was sentenced. Jonathan Gonzalez reports for the NBC4 News at 11 a.m. on Wednesday, Aug. 16, 2017. (Published Wednesday, Aug. 16, 2017)

Guerrero also was convicted of taking part in an attack on a man and woman at Dockweiler State Beach about two hours after Ji was beaten.

A third co-defendant, Andrew Garcia, 22, was sentenced last year to life in prison without the possibility of parole. Garcia was convicted June 8, 2017, of first-degree murder and one count each of robbery, attempted robbery and assault with a deadly weapon for attacking the man and woman at Dockweiler State Beach.

Alberto Ochoa, now 21, is still awaiting trial in Ji's killing, along with the Dockweiler Beach attack.

Deputy District Attorney John McKinney told jurors in Guerrero's trial that Del Carmen remained inside a vehicle after pulling over when Ji was walking near the USC campus. Garcia, Guerrero and Ochoa got out of the car to confront the victim, and Del Carmen drove around the corner as Garcia and Guerrero chased after Ji and continued the attack, during which Ji was beaten with a baseball bat.

Following the attack, Ji was able to stagger away and make his way back to his fourth-floor apartment, McKinney told jurors.

"He's dying. The fatal blows have already been inflicted. He doesn't know he's dying....," the prosecutor said of surveillance video showing the victim returning to the apartment building where he was found lifeless later that morning.

Trial Begins in USC Student's Slaying

Alejandra Guerrero is the first of three teenagers to stand trial for allegedly beating USC student Xinran Ji to death in July 2014. Ted Chen reports for the NBC4 News on Friday, Sept. 30, 2016. (Published Friday, Sept. 30, 2016)

Prosecutors opted not to seek the death penalty against Garcia or Del Carmen. Guerrero and Ochoa could not face the death penalty because they were both under 18 at the time Ji was slain.

In Ji's honor, USC established a Xinran Ji Memorial Scholarship, which is awarded annually to a promising electrical engineering graduate student from China, Hong Kong, Macau or Taiwan.

Ji's killing occurred two years after two other USC graduate students from China were shot to death during an April 2012 robbery as they sat in a car that was double-parked on a street near the USC campus.

Two men -- Javier Bolden and Bryan Barnes -- were convicted and sentenced to life in prison without the possibility of parole for the killings of Ying Wu and Ming Qu, who were both 23.

Mourners Remember Slain USC Grad Student