Delia D'Ambra

There isn't a ton of info in the available source material about him or how he came on authorities' radar, but one could assume a witness provided his name and vehicle information.

However, I don't know that for sure.

According to what a lieutenant for the sheriff's office told reporter Brian Wells, Michael was believed to have been in the area of the crime scene late Friday night or early Saturday morning.

But fairly quickly after Michael's name was printed in area newspapers, he came forward and willingly spoke with investigators.

It seems that after that conversation, authorities essentially ruled him out as being involved.

And a spokeswoman for the sheriff's office told the press that he was being cooperative.

In early November, authorities announced that Yavapai County's Silent Witness program was offering an up to $10,000 reward for information.

Coverage at the time indicates that the money was pulled together by Lisa and Brandon's family members, as well as other donors in the community.

A flyer advertising those funds featured the couple's photos, as well as a photo of Paula's white pickup truck.

Not long after that development, a few weeks into the investigation, law enforcement released information that piqued the press's interest.

It was a new detail that seemed to suggest the crime might have been related to an incident a day or so before the couple ever left to go camping.

Coverage by the Arizona Republic and East Valley Tribune states that sometime during the first few weeks of the investigation, authorities learned an argument had taken place in the doorway of the young couple's apartment between an unknown man and a young man who was seemingly Brandon.

This apparently occurred about a night or two before Brandon and Lisa left for their trip.

The unknown guy who had this alleged spat with Brandon was described as white, tall, had a husky build, and was about 40 years old.

A spokeswoman for the sheriff's office told the press that detectives really wanted to speak with this man, but without his name, they were unable to track him down.

It's unclear, though, if this lead ever materialized into anything because after November 2003, it's not really mentioned again.

What I can tell you, though, is that in early January 2004, more than two months into the investigation, the case was languishing, and Lisa and Brandon's families were growing a bit frustrated.

Paula told reporter Byron Wells that she was concerned the case would go cold due to the lack of leads and updates.

At that time, though, the sheriff's office maintained that it was as dedicated as ever to solving the crime.

Two detectives were assigned to the case, and a spokeswoman for the agency emphasized that the double homicide was still very much an active investigation.