The jury is expected to start a second day of deliberations Thursday.
Moreno is accused of raping the now 29-year-old woman while she was physically helpless after passing out. Prosecutors say Mata stood watch.
Moreno says the woman made sexual advances, and they cuddled in her bed but didn't have sex.
Jurors requested a transcript Wednesday of a taped conversation between the woman and Moreno in which he denied having sex but also said he wore a condom.
If convicted, each officer faces a maximum of 25 years in prison.