AUSTIN, Texas -- Chimene Onyeri, the man accused of trying to kill Travis County District Judge Julie Kocurek, is on trial in federal court for attempted capital murder for the 2015 attack.

Prosecutors expect the trial to last several months due to a lengthy list of witnesses they plan to have testify. Tuesday, several detectives testified about how they located Onyeri near his father's Houston home.

Investigators zeroed in on a silver Dodge Charger owned by Onyeri's friend. Several detectives from Austin Police Department, Houston Police Department and the U.S. Marshals Service explained what they witnessed in the moments leading up to Onyeri's arrest, which included three other people in the car for unrelated charges. Onyeri was arrested on a warrant out of Louisiana for a case that was not directly related to Kocurek's attack.

Retired Austin Police Detective Derek Israel said he quickly realized Onyeri's criminal history in Austin was a "small portion of what we realized was a larger problem happening outside of Austin." Kocurek was the judge overseeing a 2012 traffic stop in Rollingwood involving Onyeri, where he was found to have possessed several gift cards and credit card information. Onyeri faced losing his probation due to the new charges out of Louisiana.

Upon pulling over Onyeri and the three other men in Nov. 2015, police seized nine items from the car. They included a black Nike hoodie, Nike Air Jordan size 13 shoes, a broken Samsung Galaxy Note 5, two iPhones and a T-Mobile flip phone. Detectives also gathered remnants of a cell phone that police say was destroyed in the car.

Judge Kocurek was shot four times outside her West Austin home three days before Onyeri's arrest. Monday, her son testified before the court that he was the driver when his mother was shot.

In addition to police detectives from Houston and Austin, investigators said they received help from the FBI, IRS, Secret Service, U.S. Attorney's Office, US Postal Service and investigators in Louisiana.

The jury also heard two phone calls Tuesday made by Onyeri while he was in the Harris County Jail. Investigators say they have 429 of Onyeri's calls recorded from within the Harris County Jail between Nov. 9, 2015 and April 21, 2016.

Detectives say they initially classified the case as an Aggravated Assault. However, they soon learned the judge's profession was related to the attack, which led them to elevate it to Attempted Capital Murder. Defense attorneys seized upon that initial classification, which prompted a follow-up question from federal prosecutors.

"Would shooting someone four times be a good indication you intended to kill them," prosecutors asked retired Austin Police Det. Derek Israel.

"Yes," he replied.

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Continuing Coverage:

Judge Kocurek on Assassination Attempt: 'It Was the Most Terrifying Moment of My Life'
Judge Kocurek on Assassination Attempt: 'It Was the Most Terrifying Moment of My Life'
Judge Kocurek on Assassination Attempt: 'It Was the Most Terrifying Moment of My Life'
Judge Kocurek on Assassination Attempt: 'It Was the Most Terrifying Moment of My Life'
Judge Kocurek on Assassination Attempt: 'It Was the Most Terrifying Moment of My Life'
Judge Kocurek on Assassination Attempt: 'It Was the Most Terrifying Moment of My Life'
Judge Kocurek on Assassination Attempt: 'It Was the Most Terrifying Moment of My Life'
Judge Kocurek on Assassination Attempt: 'It Was the Most Terrifying Moment of My Life'
Judge Kocurek on Assassination Attempt: 'It Was the Most Terrifying Moment of My Life'