Roger argued that the pair had drugged and suffocated Binion and then attempted to steal his $7 million stash of silver bullion and rare coins, buried in a concrete vault in the desert 60 miles southwest of Las Vegas. The case and the May 2000 conviction drew national attention. Roger, then a deputy assistant district attorney, became a household name throughout Clark County.
The murder convictions were overturned in 2003, however, and the pair was acquitted of the murder charges, although felony burglary charges were upheld. Roger declined interview requests from ABC News.
"He has a very meticulous nature," said Peter Christiansen, a local lawyer who was the best man at Roger's wedding to his wife, Susan, who is currently a Clark County deputy assistant district attorney working under her husband in the criminal division. "He doesn't leave any stone unturned and he's a very good chess player, a very good strategist."
Referring to the Binion case, Christiansen said that Roger "took an extraordinarily difficult and complicated case to prove and … obtained a conviction that later, two very capable prosecutors couldn't repeat."
For 15 years before his election as district attorney, Roger worked in the Major Violators Bureau, rising to chief deputy assistant district attorney of that unit. He is past president of the Nevada District Attorney's Association, according to a spokesman for Roger's office.
He graduated from California Western School of Law in 1986, according to a biography posted on the Clark County District Attorney's office Web site.
Beside his picture on the Web site is the Latin phrase "Salus populi supremo lex esto," which translates to "the safety of the people is the highest law."
ABC News' Lauren Pearle contributed to this report.