A preliminary hearing is underway for Tyler Robinson, 23, who is charged with aggravated murder. The hearing, which has lasted a week, involves arguments over evidence to be admitted in court.

Defense attorneys and prosecutors are debating the admissibility of videotaped interviews, texts, and other messages. The defense is also questioning the reliability of DNA testing that allegedly links Robinson to the suspected murder weapon.

Further details on the case are available from KPRC 2 Houston. The hearing is expected to conclude soon, after which a state District Judge will determine if the case should proceed to trial.