Michael David McKee was taken into police custody and charged with the brutal murders of Ohio dentist Spencer Tepe and his wife, Monique Tepe, on Saturday, January 10. Now, the major mistake he allegedly made that led to his arrest is being revealed. McKee, 39 - who was reportedly married to Monique, 39, from 2015 until she filed for divorce in 2017 - was identified as a suspect after authorities in Columbus saw his car near the slain couple's home using neighborhood surveillance. Detectives claimed the vehicle "arrived just prior to the homicides and left shortly after," according to court documents obtained by People. It was later confirmed McKee was the owner of the vehicle at the time of the murders. Ohio Dentist Spencer Tepe and Wife Monique Killed: Everything We Know As Us Weekly previously reported, the Tepe's bodies were discovered after a coworker allegedly became concerned when Spencer, 37, did not show up for work. After making multiple attempts to contact him, the coworker called 911 and requested a welfare check. At that time, the couple was allegedly discovered dead upstairs in their Ohio home. They reportedly died in the early morning hours of December 30. Their two children and their family dog were also found in the house, all unharmed. While Monique and Spencer's cause of death is believed to be gunshot wounds, the Office of Coroner Nathaniel R. Overmire at the Franklin County stated they are still waiting on full toxicology reports. Ohio Police Searching for Suspect in Home Invasion Murders of Couple Following the killings, on Monday, January 5, police released surveillance footage of a figure in a dark hooded sweatshirt walking with their hands in their pockets, noting they were a "person of interest" in the case. Three days later, Columbus Police Chief Elaine Bryant told ABC 6 there were still "a lot of concerns and a lot of questions surrounding this case." "We want to be able to be as transparent and answer as many of them as we can. Unfortunately, there are some things that we can't talk about for the integrity of the investigation," she said at the time. On Saturday, McKee was finally arrested. He is currently in police custody as he awaits extradition to Franklin County. His next court date is scheduled for Monday, January 12. Earlier this month, the Tepes were fondly remembered by friends and family in an online obituary. Spencer was described as a sports fan who "enjoyed entertaining" and was "focused on taking care of his family," while Monique was praised as "stay at home mom known for her bright smile, infectious laugh, caring heart, and bubbly personality." "Spencer and Monique met online and quickly grew their relationship into a solid foundation of love and respect with a side of goofiness," the obituary continued. "Spencer and Monique were the life of the party, holding many family and friend gatherings. They were generous with kind hearts. Spencer and Monique will be deeply missed by their family, friends, and all who knew them." Their funeral was held on Sunday, January 11. "We are heartbroken beyond words," Spencer's brother-in-law, Rob Misleh, told People, noting they are "committed to seeing this tragedy fully and fairly brought to justice."