Every day, friends and neighbors are reminded of the beautiful lives that were stolen from them.
"The memorial -- in their subdivision is awesome. There's a bench and there's trees," Meegan Turnbeaugh explained. "...the community of Columbia Lakes got together and created that. ...So they wanted to do something positive. And they created a nice memorial."
Turnbeaugh says it's a fitting tribute - unlike the funeral service at Pastor Coleman's church.
"No friends, no family, no coaches. Nobody spoke about these three awesome people that were dead," she said.
In the days that followed the service, any sympathy for Chris Coleman was stripped away as news spread about his affair with Sheri's high school friend, Tara Lintz.
"Well, when the affair came out, and I had no idea, and I heard about it from someone else. I felt like every day I was just getting stabbed in the heart by these little pieces of information," said Kathy LaPlante.
Asked if she thought Coleman would be arrested, Turnbeaugh told Maher, "Yes. And I couldn't wait. I was nervous, to be honest with you."
The Major Case Squad felt that pressure.
"Obviously, in any case...you want to get the person responsible for it. But you want to get the right person," said Det. Justin Barlow.
But right away, there were red flags. Police were concerned when they found a basement window open and others unlocked.
"Here's a guy who's family is bein' threatened. They're gonna destroy his family while he's gone, and yet, that window was left unlocked, and it was obvious it was left unlocked, 'cause there was no forced entry," said Maj. Jeff Connor.
And remember that camera Det. Barlow installed in his house?
"We saw no strangers walking up and down the street. You saw no strange vehicles," said Chief Joe Edwards.
Chris had even installed his own surveillance cameras in his house.
"What about the surveillance equipment that was allegedly in the house?" Maher asked Maj. Connor.
"The recorder was missing," he replied.
An autopsy on Sheri revealed she fought violently with her killer, leaving her with two black eyes.
"Sheri was involved in an altercation before she was murdered. Those two boys weren't," said Chief Edwards.
Which made scratches found on Chris Coleman's arms all the more suspicious.
"When did you first notice the scratches on his arms?" Maher asked Det. Barlow.
"It was brought to my attention by people at the scene," he replied.
Det. Barlow: How are you doing?
Chris Coleman: Freezin.
Det. Barlow: Anything I can get you? You're freezing?
Police say Coleman tried to hide his arms during his interview.
"You can see on the video where he's asking for a blanket because he says he's cold. The only part of his body that he covers up are the -- you know, suspected-- marks on his arm," Barlow explained.
Det. Barlow: That'll work, won't it.
Chris Coleman: Yeah that's fine. As long as I can cover my arms. I'm freezing. [Covers his arms]
"I remember in the interview room it being very warm in there," Barlow told Maher.
"Did you think he was in shock?"
Chris later claimed he got those scratches the day before when he was removing a satellite dish from his roof.
Asked if there was any DNA found at the scene that would implicate him, Det. Barlow said, "I'll just say there wasn't any DNA found that didn't belong there. No boogeyman, no -- unidentified DNA, anything like that."
There was incriminating evidence found on Chris' phone and computers, starting with X-rated snapshots and videos that Tara Lintz and Chris had sent each other.
"It was a serious affair. He had written down every -- her measurements, her favorite things. Everything about her he had stored so he could, you know -- buy her things or do whatever for her," reporter Nick Pistor said. "By November 5th of 2008, Chris had written on his computer that that was the day Tara changed his life."
For police, that date would set off alarms bells.
"And how many days after that, then, did the threats start to show up?" Maher asked Pistor.
"About nine days after that," he replied.
Nine days. The Colemans insist it's all a coincidence.
"It's my understanding that he had written down, 'November 5th, the day Tara changed my life.' That they had exchanged promise rings... And that he had even written down the name of their first child were it to be a little girl," Maher commented to Chris' parents. "Is that true?"
"That's not Chris," said Ron Coleman.
"Honestly, I cannot imagine him doin' that," Connie Coleman said. "He just didn't really operate in that -- in that arena of -- emotions. He just didn't. He was just very calm and logical sense."
Chris' parents believe their son is innocent and that it was an intruder who killed his family and left hateful messages. In fact, Chris even voluntarily provided samples of his own handwriting to police.
Asked what was the most important piece of evidence at the crime scene, Maj. Jeff Connor told Maher, "At the crime scene, probably the handwriting on the walls."
But those samples would later come back to haunt Chris Coleman.
"The crime scene lab coming back and saying that the handwriting found on the wall matches up to the handwriting -- from the handwriting example that Christopher Coleman gave at the Columbia Police Department," said Det. Barlow.
Finally, two weeks after the murders, police felt they had enough to make their case. Christopher Coleman was charged with the first-degree murder of his wife and two sons.
"If it was another time they would have had pitchforks and lanterns in their hands," Pistor said of the public's reaction. "They were out for vengeance. They wanted this case solved and they wanted it solved immediately and they wanted him to be found guilty immediately."
"Were you there when he was arrested?" Maher asked Ron Coleman.
"Yes. It was at night," he replied. "...the worst scenario. ... we'd lost Garett and Gavin and Sheri and now Chris is gone."
Sheri's friends and neighbors were relieved, but angry at the toll it had taken on them and their children.
"I've talked to some of the moms, and the children in the community wonder if their dad could do the same thing," said LaPlante.
And investigators insist all this pain was caused by Chris Coleman's obsession.
"And all because of a woman," Maher commented to Maj. Connor.
"I believe that had a major part of it," he said.