CHICAGO — A second man was found guilty Friday in the killing of Tyshawn Lee, a 9-year-old boy who was executed in a 2015 Chicago gang hit that shocked the nation for its brutality.

Jurors found Corey Morgan, 31, guilty of murder in the first degree for abetting his friend Dwright Boone-Doty, who prosecutors say shot the boy in the head after promising to buy him a treat and luring him into an alley.

Late Thursday night, a separate jury found Boone-Doty, 25, guilty of murder in the first degree.

Both men face up to life in prison.

"JUSTICE BABY," Tyshawn's mother, Karla Lee, said in a string of Facebook posts early Friday morning. She cheered the second verdict in a later post, writing "thank you god."

Murder of Tyshawn Lee horrified Chicago:Now, gang members will stand trial

Murder of 9-year-old Tyshawn Lee:Jury finds Chicago gang member guilty

Cook County State’s Attorney Kimberly Foxx said she was pleased with the outcome of the case and hoped that the verdicts would bring some measure of closure and peace to Tyshawn's family.

“Even at a time when we’ve become nearly numb to headlines about violence, this case shook us to our core. We grieve for 9-year-old Tyshawn as we continue to hold close those who are laboring in his wake," Foxx said in a statement Thursday.

"As a mother and prosecutor, I think often about Tyshawn’s fourth grade classmates who returned to school and sat beside an empty desk following this egregious murder and will be graduating eighth grade without their friend on stage later this school year. The trauma is far-reaching and impacts us all, collectively," she said.

While Boone-Doty's jury took just over two hours to reach a verdict, Morgan's jury deliberated for nearly 10 hours and was sequestered overnight.

Defense attorney Todd Pugh said he feared that the prosecution's focus on gang culture and history on the city's South Side influenced the jury's final verdict.

“There’s a tremendous amount of repealable issues in this case, and we’ll start the work of putting post-trial motions together,” Pugh said.

Over the past three weeks, Boone-Doty and Morgan were tried before separate juries, who shuffled in and out of the courtroom to hear evidence with respect to each case.

A third man involved in the murder, Kevin Edwards, pleaded guilty to first-degree murder in exchange for a 25-year prison sentence.

After school on Nov. 2, 2015, Tyshawn was sitting on a swing at the park down the street from his grandmother's house when Boone-Doty approached him, dribbled his basketball, offered to buy him anything he wanted and then led him to an alley, where he shot the child several times at close range, prosecutors say.

The execution-style shooting was an act of revenge, according to prosecutors. Boone-Doty and Morgan, members of the same gang, believed that a rival faction had killed Morgan's 25-year-old brother and wounded his mother a month earlier.

Morgan and Boone-Doty were angered by the attack and wanted to get back at Tyshawn's father, Pierre Stokes, who was also an alleged member of the rival gang, prosecutors say. So Boone-Doty struck up a conversation with Tyshawn and led him to the alley.

Shell casings at the scene of the crime and the associated gun would eventually be linked back to Morgan and his brother, Anthony Morgan, who purchased the gun from a man in New Mexico.

Defense attorney Tom Breen said he hoped Chicagoans could learn something from Tyshawn's case.

“I’m just hoping that the moment of interest in this case isn’t fleeting—that people look at that beautiful young boy and see what the outcome of violence can look like,” Breen said. “Maybe we can learn something from this. Maybe we can’t.”

In 2015, violence was on the rise in Chicago, and the following year saw an even greater surge of violence.

But even at its peak, Chicago's homicide rate (per capita) remained lower than that of cities like Detroit, New Orleans or St. Louis, a 2016 study by the University of Chicago's Crime Lab found. The city, however, had the highest gun homicide rate of the five largest U.S. cities in 2016.

For the past two years, shootings in Chicago have declined year-over-year, and 2019 is on track to continue the trend. The CPD announced in September that August experienced its lowest number of murders and shootings since 2011.