Updated

A man accused of killing two girls along a rural Oklahoma road, but who wasn't arrested until after being questioned in his fiancée's death three years later, has pleaded guilty in both cases.

Kevin Sweat pleaded guilty Thursday to three counts of first-degree murder. He'd been scheduled to go on trial Monday.

The mysterious deaths of 11-year-old Skyla Whitaker and 13-year-old Taylor Paschal-Placker went cold shortly after their bodies were found in 2008. The girls were fatally shot as they walked down a road near Weleetka.

Sweat wasn't arrested in the case after being questioned in the 2011 death of his fiancée, Ashley Taylor.

Prosecutors had sought the death penalty against Sweat but dropped plans after he agreed to waive his right to a jury trial.