It's more common for blacks to engage in incest but it doesn't perpetuate the white people are trailer trash stereotype so the media stays mum about it.
http://www.nydailynews.com/new-york/brooklyn/call-prosecute-dad-false-gang-rape-incident-article-1.2552035black dad caught raping 18 yr old daughter in public, then got scared when teens caught them. he wasn't charged for incest unsurprisingly like huwhite dad.
http://dfw.cbslocal.com/2015/06/03/pregnant-teen-allegedly-beat-until-miscarriage/black family beats 14 yr old raped by her brotehr and forcefully aborts her retard fetus because they were scared it would affect their gibs.