MILWAUKEE (CBS 58) -- The jury trial for the man charged with shooting and killing Milwaukee Police Department Officer Kendall Corder last June got underway on Monday, March 30. 

The accused, 23-year-old Tremaine Jones, is facing four felony charges. 

He pleaded not guilty to possession of a short-barreled rifle -- a charge just added Monday because attorneys say they were waiting for measurements to come back from the gun Jones reportedly used to shoot Officer Corder. 

Jones is facing three additional charges -- all felonies -- first degree intentional homicide, attempted first degree intentional homicide, and first degree recklessly endangering safety, each involving the use of a dangerous weapon. 

Monday morning, jury selection got underway. The judge sat down with the attorneys for over an hour going through questionnaires. We've heard the pool of jurors is over 100. 

Inside the courtroom there are 30 juror seats. 

The case centers itself on June 26, 2025, when Officer Corder was shot as he and his partner, Officer Christophere McCray, responded to multiple 911 calls near 24th and Garfield. The calls were reporting a man firing what was described as a machine gun into an apartment building. 

Officer Corder was shot three times, in his neck, arm and lower right leg. Officer McCray was shot in his right foot, thigh and back. 

Corder died three days later at 32 years old. 

One of Corder's family members left as soon as Jones walked into the courtroom. 

Meantime, one member of Jones' family at one point said, "We love you Maine Maine." 

With the additional charge, if found guilty, Jones could face life in prison plus 83 years. 

Once jury selection wraps up, we expect opening statements and for the state to start calling witnesses.