CHICAGO (CBS) — A public defender’s plea for a low bond so a murder suspect could take his college exams fell on deaf ears, as a judge set his bail at $500,000.

WBBM Newsradio’s Bernie Tafoya reports 45-year-old Anthony Jackson’s public defender asked a Cook County judge to set his bond low enough so Jackson could take exams this week at DePaul University, where he studies computer science.

Instead, Judge Israel Desierto ordered Jackson held on $500,000 bond for a charge of first-degree murder in the beating death of 37-year-old Sanchez Mixon at the 43rd Street Green Line station on Saturday.

Jackson is accused of stomping Mixon to death on the Green Line platform at 314 E. 43rd St. on Saturday.

Prosecutors said Jackson punched Mixon, knocking him to the ground, after they started talking on the platform. Jackson then began jumping on Mixon’s head with both feet.

He allegedly stopped briefly for breaks while stomping Mixon, according to horrified CTA passengers who screamed and called police.

Jackson fled the scene, but was caught on surveillance video, and turned himself in two days later.