Kings center Richaun Holmes vehemently denied abusing his son in a series of since-deleted tweets Wednesday after The Sacramento Bee reported claims made in an ugly custody battle between Holmes and his ex-wife. In court documents, Allexis Holmes accused her ex-husband of domestic violence and physical abuse of their 6-year-old son, alleging he caused the boy to bleed from a blow to the head during a Feb. 6 visitation. Richaun Holmes responded to the allegations on Twitter before deleting the tweets moments later. “I never respond to allegations but when it’s comes to my son I gotta speak,” Ho…