Nanny Stephanie Lak, who used Care.com under her name and the name Stephanie Germaine, has been arrested after Boston Police received a cyber tip from the National Center for Missing and Exploited Children. The 36-year-old has been charged with possession of child pornography and distribution of material of a child in a sex act. Lak has a long history as a babysitter and nanny and investigators are reaching out to anyone who may have had contact with her on Care.com.