Authorities have arrested a Chicago physician in connection with the murders of his former spouse and her dentist husband in Ohio, following a pivotal lead in the investigation.

Michael David McKee, aged 39, faces charges related to the tragic deaths of Spencer Tepe, 37, and Monique Tepe, 39. The couple was discovered deceased at their home in Weinland Park on the morning of December 30, as confirmed by officials.

McKee’s arrest occurred in the Chicago area after detectives were able to track his vehicle using surveillance footage from the neighborhood surrounding the Tepes’ residence, according to court records.

Detectives noted in the court documents that McKee’s car was seen arriving shortly before the murders and departing soon after. This crucial piece of evidence allowed investigators to identify the vehicle and connect it to McKee.

Michael David McKee now faces two murder charges in the deaths of Dr. Spencer Tepe and his wife Monique Tepe, as reported by the Winnebago County Sheriff’s Office.

Detectives said they located the car in Rockford, Illinois, noting that they found evidence that McKee had been in ownership of the vehicle throughout the incident, the documents stated.

McKee was booked at the Winnebago County Sheriff’s Office in Illinois just before noon Saturday, records show. He’s being charged with two counts of murder in Ohio.

Spencer and Monique Tepe are pictured on their wedding day. (Rob Misleh)

McKee’s neighbor, Gera-Lind Kolarik, told WLS-TV after his arrest that “he did not seem like somebody who would do something like this.”

“I sat down with this man and talked with him at the pool, barbecuing, about what a beautiful day it is — and then he turns out to be [charged as] a killer,” she said. “It’s kind of shocking.”

Spencer and Monique Tepe were found dead on Dec. 30. (Rob Misleh)

Detectives in Columbus believe the murders took place between 2 a.m. and 5 a.m. Dec. 30. The bodies were discovered after one of the Tepe’s friends went to the couple’s house and told a 911 operator he could see a body inside.

Both of the couple’s children were found safe inside the home when officers arrived. Police didn’t find signs of forced entry, and a weapon was not recovered from the home, officials said.