A Sevier County man already serving a life sentence added forty more years to his life behind bars Tuesday morning.

Prosecutors say Tyler Schaeffer was on his way to a drug deal when he crashed his SUV into the Cedar Grove Baptist Church van on Chapman Highway, killing two people and injuring more than a dozen more.

Schaeffer was sentenced to 100 years in prison in April on federal robbery, drug and gun charges.

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Wednesday, he pleaded guilty to charges directly related to the fatal 2012 crash.

"We're feeling relieved," said Chuck Jones, victim's father. "We've had this date circled on our calendar and it's been moved several times. It's great to find some measure of closure."

He pleaded guilty to 2 counts of vehicular homicide, 2 counts of aggravated assault, 9 counts of vehicular assault, and a drug charge for a combined forty year sentence. It will run concurrently with the century-long federal sentence.

"We're going to take God with us into this next chapter," Kim Trussell, victim's wife. "We just want to put that day, we just want to put Tyler behind us and move on with our lives."

Prosecutors said Schaeffer was high on bath salts when he crashed into the church van. The group was on their way back to their Blount County church from a weekend retreat in Gatlinburg.

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The crash killed 16-year-old Courtney Kaliszewski and youth leader Jeff Trussell. Ten other youth group members were injured.

"I don't think he even realizes the impact on what he has done on so many lives. I think at his age, I think at the lifestyle he was living, I don't think he realizes," Kim Trussell said.

His earlier sentence was related to a series of armed robberies in Knox, Sevier, and Blount Counties between July 26, 2010 and September 14, 2012. The final robbery happened just two days before the church van crash.

Chuck Jones' daughter, Kelsie, was in the van at the time of the crash. He said what started off as the words 'critical condition', has turned into a miracle.

"Today my daughter, probably the most injured survivors, we are grateful to say is taking classes at Seymour High School where we expect her to be a valedictorian candidate," said Chuck Jones. "Things we are very proud of."

The judge allowed the victims and family members of the victims to testify in the federal trial.

They were also given the opportunity Tuesday to give victim impact statements, and several of them did. Kim Trussell said she decided to use kindness in her statement, rather then anger.

"I've spent two years being angry. I am still angry in a lot of ways," she said. "But God commands me to forgive. So even if I am telling him that I am not ready yet, I know that's something that I'm supposed to work on."

After they spoke, Schaeffer apologized for causing the fatal crash.