Susan Hendricks

requesting a wellness check.

A co-worker of Spencer goes to the Tepe residence and calls 911, explaining Tepe is her boss and they haven't been able to get a hold of him.

The caller tries to tell dispatch they can hear kids inside, but the dispatcher talks over the caller, telling her, I just talked to somebody there.

The distraught co-worker apologizes, saying she was just making sure someone called.

One of Spencer's friends goes to the Tepe home and calls 911 at 9.57 a.m.

Dispatch tells the friend officers have already been to the location and knocked on doors and got no answer.

The friend says, yeah, no answer.

I can hear kids inside and I think I heard one yell.

At 10, 11 a.m., police officers are back at the Tepe residence, securing the crime scene.

Two adult victims suffering apparent gunshot wounds are located and medic personnel pronounced Spencer and Monique Tepe dead.

Minutes after arriving on scene, three bullet casings are found, but no gun is immediately located.

The couple has two children, ages four and one, who are found unharmed.

Investigators get all available surveillance video from the Tepe neighborhood, focusing on the time between 2 a.m.

and 5 a.m.

and release video of one person walking in the alley behind the Tepe home.

One car with an Illinois license plate arrives in the neighborhood shortly before the Tepe murders take place and leaves shortly thereafter.

The license plate on the vehicle is registered to Michael McKee, a vascular surgeon in Chicago.

McKee is also Monique Tepe's ex-husband.

I think that's exactly what they did, Nancy.

And once they were able to get that license tag and find out the car is registered in Illinois, they actually, police, tracked the car back to where it