Hold it, what?
The DNA of a sex offender would not change anything, as it does not explain the mountain of damning details and facts here. The great news is that if the defense is telling the truth, the prosecution now has an actual person to exclude, as opposed to some phantom.
Some predator didn’t kidnap Suzanne, enter her car, leave her purse, stage a bicycle, dump a helmet, force Barry to lie about when he woke up, put Barry outside when he should have been sleeping, put Barry in the vicinity of the bike, shut down Suzanne’s phone at the precise moment Barry needed it to, force Barry to chase elk towards the helmet location, force him to dump 5 bags of trash, force him to lie about working, force him to lie about where he was when he got that call, force him to lie about the state of their marriage, and Suzanne wanting a divorce.
He didn’t cause Suzanne’s footprint to cease to exist on that afternoon, put Barry’s phone on airplane mode, disappear her journal, scratch Barry’s arms.