She was a single woman who was killed by Ray Speltzer.
According to the police report, Ann went missing on 10 April 2012, after going on a date with Speltzer. When her beaten body was found, Miami Metro Homicide tried to tie Speltzer to the murder, but failed.
Dexter showed her file to Debra, explaining that Speltzer shaved his head before he killed her and Nina Fleischer. He pointed out that Speltzer had just shaved his head again and was, therefore, likely to kill again.