The charred remains of missing 23-year-old Utah college student MacKenzie Lueck were discovered last week after police searched Ayoola Ajayi’s home.

Neighbors said they saw 31-year-old Ayoola Ajayi burning something in his backyard, according to reports.

Salt Lake City police had been searching for MacKenzie Lueck for 11 days before they discovered her charred remains.

According to reports, MacKenzie was dropped off at Hatch Park at 3 AM by a Lyft driver after landing at Salt Lake City airport on June 17. The Lyft driver was cleared of any involvement in Lueck’s disappearance and murder.

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Authorities combed through MacKenzie’s phone and social media records where they made the connection to Ajayi — both were at the same park at the same time of her disappearance and Ajayi initially denied knowing MacKenzie.

According to the New York Post, investigators had also been digging into Lueck’s dating apps after receiving tips that she was interested in older men and casually seeing several people.

Ajayi’s booking record in jail says he was born in Nigeria.

John Binder at Breitbart.com reported that Ajavi came to the US on a student visa and wanted to become a naturalized citizen.