A Bed-Stuy woman was arraigned yesterday after allegedly murdering her son this past Friday. According to court documents, Tenika Revell called police to report she had killed 7-year-old Bernard Revell after taking some pills. She apparently hit him in the head with a hammer, choked him and then strapped a belt around his neck. Police say Revell has been charged with second-degree murder, manslaughter and endangering the welfare of a child. Police: Woman confesses to killing 7-year-old son