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Police arrested and charged a Chicago man with fatally stabbing his boyfriend during a heated argument Sunday, after the suspect was accused of cheating on his partner, DNAinfo Chicago reports.

Clifton Hooker, 32, was at his home when his boyfriend Alphonzo Guinyard, 26, came home around 8:34 a.m. Sunday, Assistant State's Attorney Lesley Gool said during a bond hearing Tuesday.

During the incident, Guinyard reportedly accused Hooker of cheating and wanted to see his phone.

The couple argued and Hooker asked Guinyard to leave the house, according to Gool. He refused, however, and Hooker allegedly called police to report an "unwanted person" inside the home. The incident escalated and turned physical, according to prosecutors. Hooker eventually went upstairs to a second-floor kitchen and allegedly grabbed an 8-or-9-inch knife, Grool said.

When Hooker returned, the men got into a physical altercation that ended with Hooker fatally stabbing Guinyard in the back, prosecutors said. The knife wound was about 12-centimeters deep and tore through Guinyard's spinal cord, aorta, esophagus and the lower lobe of his left lung, Gool said, according to DNAinfo Chicago.

The Cook County Medical Examiner's Office said significant force would be needed for that kind of wound. The officials added the angle of the wound was very straight forward.

Guinyard died at the scene, DNAinfo Chicago reports.

Hooker called 9-1-1 and admitted to authorities that he stabbed his boyfriend, who was unarmed, prosecutors said.

Hooker and Guinyard knew each other for six years, the Chicago Sun-Times reports. The newspaper writes Guinyard was a native of Titusville, Florida. He graduated from Culver-Stockton College in Canton, Missouri, and worked at Macy's, according to his Facebook page.

Hooker was charged with first-degree murder and has a separate pending case for battery, criminal damage to property and criminal damage to a motor vehicle. He is currently being held on a $1 million bail.