The proposal could spark a wider debate about whether Utah should execute criminals and whether, logistically, it can continue the practice.
Ray successfully sponsored a measure this past session that drew global attention, bringing back the firing squad as a backup for executions if Utah is unable to obtain the chemical cocktail for lethal injections, a problem that has arisen in other states.
When that bill passed, Utah's Senate Judiciary Committee voted to study the death penalty more broadly.
Meanwhile, opponents of capital punishment cited a growing chorus from groups in Utah seeking to abolish the practice — although they still are seeking a sponsor for such a measure.
Nebraska's Legislature passed a bill last week repealing the death penalty, although the governor may veto it.
Ray's latest bill comes, he said, partly as a result of vice squad ride-alongs he has taken.
The experiences prompted him to push several bills cracking down on prostitution and sex trafficking.
He said he was inspired by the anti-sex-trafficking work of Utah Attorney General Sean Reyes, who traveled to South America last year as part of an undercover sting to break up such a ring.
Ray is prepared for pushback from civil-liberties groups and others — and they are ready to deliver it.
Marina Lowe, legislative and policy counsel with the American Civil Liberties Union of Utah, said expanding the death penalty is the wrong way to go, arguing it would not deter child-sex traffickers.
In addition, the group generally objects to capital punishment because it is costly to carry out, does not provide closure to victims and has resulted in the execution of people wrongly convicted.
"It's increasingly becoming more and more difficult to figure out ways to humanely, if that's even possible, put people to death at the hands of the state," Lowe said. "So expanding the death penalty seems odd."
The Libertas Institute, a libertarian think tank, published an opinion piece in The Salt Lake Tribune last week calling for an end to the death penalty in Utah on similar grounds.
There also may be constitutional problems with Ray's proposal. In the 2008 case of Kennedy v. Louisiana, the U.S. Supreme Court struck down a statute that imposed a death sentence for rape of a child and said that execution would be disproportionate punishment, violating the Eighth Amendment, in cases that don't involve the death of the victim.