Michael Dunn was convicted on Friday of first-degree murder and has been given a maximum life sentence without parole plus 90 years for killing an unarmed African-American teen Jordan Davis in a dispute over loud rap music.

As the prosecutors did not pursue death penalty, Dunn, 47, received a mandatory sentence for life. Judge Russell Healey sentenced the software engineer Dunn to life imprisonment on all counts: life without parole for the first-degree murder of Davis, an additional 15 years for gun firing into a moving vehicle and three consecutive 30-year sentences for the attempted second-degree murder of the teenager's friends.

Finally the 'Loud music' chapter has been closed after Dunn's sentencing on Friday.

On Nov. 23, 2012, Dunn approached Davis and three of his friends to turn down the volume of the music in their SUV. After that a heated confrontation occurred between Dunn and Davis. Dunn affirmed that Davis threatened to kill him even the 17-year old boy was unarmed. Dunn suddenly pulled a weapon and fired 10 rounds into the African-American teenager's SUV which fatally wounded the teen.

On Friday during the last hearing, Dunn made a public apology towards the teenager's family. "I want the Davis family to know I truly regret what happened. I'm sorry for their loss and if I could roll back time and do things differently I would."

Several jurors became emotional during the sentencing of Dunn as the parents of the departed teenage boy spoke. "I wish no parent had to cry these kinds of tears," Ron Davis, the teenager's father said. "I gave him his first kiss as he came into the world. I held my son in my arms in the hospital and kissed him his last goodbye. The old Ron Davis died that very night with Jordan. We all loved him very, very much."

Before finally issuing the final verdict to Dunn, Healey rejected earlier a motion for new trial explaining that Dunn's actions proved as improper rulings by the judge.