Article here. Excerpt:

'When Mariah Yeater accused Justin Bieber of being the father of her baby, she said he was the only one who could've done the deed. But what about the former boyfriend she allegedly identified as the baby daddy back in December?

...

Former boyfriend John Terranova, 18, heard from Yeater in December that she was pregnant and he was the father, Terranova's grandmother Frances Lippe told TMZ. Long story short: That who's-the-daddy visit led to an alleged argument, capped by an alleged window-breaking by Yeater, followed by an alleged return by Yeater to discuss paying for said window, finally wrapped up with Yeater's arrest on suspicion of domestic violence after police were called to sort out the second argument that broke out, which allegedly included Yeater slapping her ex repeatedly. (She's due in court Dec. 12 to deal with that charge.)

...

Also noted by Team Yeater: Despite the age difference — she's 20 now, he's 17, and a year ago they were, well, each a year younger — she would "not technically" need to worry about statutory rape charges, because in this case it would only be a misdemeanor, and a $5,000 fine would be worth it if she got the child support she's seeking.'