A registered, violent sex offender pleaded guilty Monday to altering a child's birth certificate to list him as the child's biological father.

Don Allen Coleman, 37, entered a guilty plea in Knox County Criminal Court to a charge of fabricating evidence. He was arrested in November following an investigation by the Knox County Sheriff's Office Sex Offender Registry Enforcement Unit.

Coleman has a prior conviction of aggravated sexual battery of a 9-year-old child.

Because Coleman is a registered sex offender, he cannot live with any child that is not his biological child, and cannot be a step parent. A birth certificate listing him as the biological father of the child in question would have permitted him, under state law, to reside with the child, according to KCSO.

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