SOUTH BEND — A 27-year-old man was charged Monday with aggravated battery and reckless homicide in the death of a 63-year-old man who had been on his first night of duty as a security guard at a South Bend bar early Saturday.

Prosecutors allege that Joshua M. Kati of South Bend struck James E. Muddiman Sr. on the right side of his face after Muddiman stopped Kati’s girlfriend from leaving with an alcoholic beverage. The incident took place at closing time, 3 a.m., inside South Bank bar in the 1700 block of Lincoln Way East.

According to witnesses, Muddiman fell to the ground and struck his head on the concrete floor. He was taken to a local hospital, where he died of severe head injuries and brain trauma later that day.

Kati was serving a 20-year sentence on home detention for dealing cocaine. He had been convicted of selling nearly 30 grams of the drug to an undercover officer in 2004.

Prosecutors on Monday asked for a higher than standard bond of $100,000 cash because of Kati’s criminal history. Prosecutors say Kati has been convicted of domestic battery, theft, phone harassment, resisting law enforcement and two counts of consuming alcohol as a minor.

Muddiman worked as a part-time security officer for Indiana University South Bend and ran his own private investigation and security service company, called Infinity Investigations, out of his home in South Bend's near northeast side neighborhood.

Efforts to contact Muddiman's family members Monday were unsuccessful.

Staff writer Dave Stephens contributed to this report.