SALT LAKE CITY (AP) — Authorities investigating the killing of Utah college student Mackenzie Lueck have searched dating sites for her and a man charged in her death, court documents show.

Police seeking evidence against tech worker Ayoola Ajayi searched the site Seeking Arrangement, which bills itself as a way for wealthy "sugar daddies" to meet women known as "sugar babies," according to the documents filed Friday.

Authorities also searched Tinder, Instagram, Snapchat and Facebook, but the documents don't detail what evidence might have been found.

Police and prosecutors have not said how Aj...