Florida ? Two men were held late Sunday on open murder charges in the slaying of a wealthy Florida Panhandle couple known for adopting children with developmental disabilities.

Day laborer Wayne Coldiron turned himself in to Escambia County authorities, and Leonard P. Gonzalez Jr. was arrested in neighboring Santa Rosa County, Escambia County Sheriff David Morgan said.

Earlier Sunday, 56-year-old Leonard P. Gonzalez Sr. was charged with evidence tampering. Police said he tried to paint over and hide damage on a red van that was spotted on surveillance video leaving the home where Byrd and Melanie Billings were shot to death Thursday while eight of their children slept.

More arrests are expected.