His death shocked the Arizona State University campus and the entire valley.
On Oct. 17, 2010, 21-year-old Zachary Marco was shot while heading home from a night of studying. He later died at a hospital in Tempe.
Two people have pleaded guilty to his murder and on Wednesday, the one investigators believe pulled the trigger was sentenced.
21-year-old Louis Eugene Harper will spend much of his life, if not the rest of his life, in prison.
Others involved identified Harper as the triggerman, the one who shot the ASU junior walking home from the library -- then took his laptop computer and cell phone.
In court, Marco's father, a former defense attorney, addressed the judge.
"He didn't steal a broken computer, he didn't steal a cell phone, an unusable cell phone. He stole a life and if he was any kind of man, he would offer his in return," said Daniel Marco.
Zachary's devastated mother spoke out too.
"You can't do the thing I would like you to do most, which is bring me back my son, but you can make sure that Mr. Harper doesn't do this to somebody else."
Harper pleaded guilty to first degree murder and armed robbery. Marco's family says Harper has shown no remorse over the past two years.
Before Harper was sentenced, he given the opportunity to say something, anything -- to the judge or Marco's family, but he squandered it.
"I have nothing to say."
"I think that if you take this entire two years that sums it up. Has nothing to day," said Daniel.
Marco was a stand-out student at ASU and wanted to be a lawyer and politician. He was even part of the state legislature's page program.
Daniel was ready to see Harper taken away.
"It is difficult to go into a courtroom where the subject is. Your dead son over and over and over again and have the family act like as if somehow, we brought this down on them and the defendant acts like somehow I brought this situation on him."
For the murder charge, Harper received a life sentence with the possibility of parole after 25 years and at least 15 years for the armed robbery. The judge ordered that those sentences to be served consecutively.
Harper won't be up for parole for nearly 40 years.
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