When Heather meets with Souza in Chapter 15, what does she tell him about her lavender dress?

When Heather meets with Souza in Chapter 15, she tells him that Jamey stole her lavender dress a year before the murders occurred. Heather also says that Jamey wore the dress on a date with Digby Chancellor. Heather says she looked for the dress, but she never found it or saw it again.