Following info from Bail Application:
Maureen Brainard-Barnes [Heuermann not yet charged with her death]
Last seen alive: 9 July 2007 in New York City
Defendant’s wife's location during crime: neither cell billing records nor travel/financial records were available for Heuermann’s wife in 2007 due to retention policies and, therefore, it remains undetermined if Heuermann’s wife was out-of-state during Brainard-Barnes’ disappearance and murder.
Melissa Barthelemy
Last seen alive: 10 July 2009 in NYC
Defendant’s wife's location during crime: From 8 July 2009 through 18 Aug 2009, Heuermann’s wife was out of the country (she departed for Iceland 8 July 2009). Heuermann himself departed for Iceland on 10 Aug 2009 and returned from Iceland 18 Aug 2009.
Megan Waterman
Last seen alive: 6 June 2010 at Holiday Inn in Hauppauge, NY
Defendant’s wife's location during crime: 4 June 2010, Heuermann’s wife’s cell traveled from NY state to Maryland and on 8 June 2010 her cell returned to New York from Maryland
Amber Costello
Last seen alive: 2 Sept 2010 as she left her home at 1112 America Ave., West Babylon during late evening hours
Defendant’s wife's location during crime: 28 Aug 2010, Heuermann’s wife’s cell traveled from New York to New Jersey and returned to New York 5 Sept. 2010