KALAMAZOO, Mich. -- The wife of the former Uber driver charged in the slayings of six people in southwestern Michigan has filed for divorce, CBS affiliate WWMT reported.

Jason Dalton is jailed on six counts of murder and two counts of attempted murder for Saturday's random shooting rampage. Eight people were shot at three locations in the Kalamazoo area. Two survived.

A source in Kalamazoo County Family Court told WWMT Carole Dalton filed the paperwork Thursday. The divorce filing said "there has been a breakdown in the marriage relationship," the Kalamazoo Gazette reported.

Jason and Carole Dalton married in 1995 and have two children, ages 15 and 10. The newspaper reported that 45-year-old Jason Dalton earned $50,000 per year at an appraisal company. He also worked as an Uber driver and was transporting passengers the day of the shootings.

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Funerals for four of the victims will be held Saturday, according to WWMT. A community vigil will be held Saturday night at the car dealership where a father and son were killed.

Investigators have not disclosed a motive for the shootings. On Thursday, a lawyer for Dalton's family told WWMT he was acting depressed in the days before the killings.