Suspects charged with murder of Florida couple

PENSACOLA, Florida (CNN) - Investigators have three suspects in custody, including two facing murder charges, in the probe into the killings of a Gulf Coast couple known for adopting special-needs children.

At a news conference Monday, one of the couple's grown children said the family does not know the suspects.

"We have no knowledge of them," said Ashley Markham, biological daughter of Melanie Billings.

"We just – we want justice."

Billings and her husband, Byrd, had 17 children total, including many with special needs. Nine of them were at home when the couple was shot and killed Thursday night.

Two suspects, Wayne Coldiron and Leonard Patrick Gonzalez Jr., face murder charges, said Escambia County Sheriff David Morgan.

Coldiron, 41, surrendered to investigators Sunday and Gonzalez was arrested in neighboring Santa Rosa County on Sunday evening, Morgan said. Gonzalez's age was not immediately released.

The sheriff was announcing Coldiron's arrest to reporters when detectives informed him that Gonzalez was in custody.

In addition, Gonzalez's father, Leonard Patrick Gonzalez Sr., 56, has been arrested on evidence-tampering charges. He is accused of trying to disguise a red Dodge van that surveillance cameras captured leaving the slain couple's home.

Investigators had distributed images of the van, and its discovery Saturday was "the linchpin in this case," Morgan said. The elder Gonzalez "was covering damage and painting the van ... so that it would not be readily recognizable."

Morgan said the "multi-faceted" probe has become "a window into something bigger," with multiple motives and multiple suspects. But he released few details.

At Markham's news conference Monday, the family's attorney Crystal Spencer said there are "other arrests expected."