They can apply for parole in 2038 (source) which is 2013 + 25 years.
Not sure how a conviction for Babcock's murder will affect them. Will it be an additional 25 years (2063) before parole, or will it be concurrent with the Bosma prison time? If it's concurrent, having the two convictions will carry negative weight on their chance of getting parole once they're finally eligible for it.
Doesn't make sense. They've been in jail for three years already, so it would make more sense that they could apply for parol in 22 years or less.