A trial date has been set for a nanny accused of fatally beating a 1-year-old in her care in January. Aisling McCarthy Brady, 34, an Irish native who was living in the country illegally, is slated to be tried in Middlesex Superior Court in Woburn on first-degree murder charges on April 7, 2014. Prosecutors say 1-year-old Rehma Sabir was in Brady’s sole care when she sustained blunt force injuries that were consistent with violent shaking. Brady’s lawyer has maintained her client’s innocence.Peter Schworm can be reached at email@example.com. Follow him on Twitter @globepete.