The two remaining suspects in the Sunday Alta Mesa Park murder turned themselves in Monday evening. Raquan Matthews, 17 years of Redding and Dillon Sims, 18 years of Redding were arrested and taken to the Investigations Division. They provided statements regarding their actions. They are suspects in the murder of 21-year-old Thomas Sladek. 20-year-old Logan Barnhard, a third suspect, was taken into custody Monday afternoon at a home on Newbury Lane.