Thousands of text messages, photos and videos extremely graphic and sexual in nature allegedly sent by Inlow were retrieved from the phone of the woman, 21, investigators said.
In an interview with investigators on March 29, she spoke of a two-year relationship with Inlow and other Marco Island officers while they were on duty.
The woman had accused Inlow of making threats Aug. 23, 2017, during a confrontation with Inlow and his wife at a Starbucks in Marco Island, WBBH reported.
The investigation turned to Giansanti after the Collier County Sheriff's Office submitted its findings from a forensic examination in March, the Daily News reported.
According to investigators, the phone of a woman -- it is unclear whether it was the same woman mentioned in the Inlow probe -- contained a 45-second clip of Giansanti putting his uniform back on next to his squad car, the Daily News reported. The woman also appears in the video, the newspaper reported.
In her interview with investigators, the woman claimed she had sex with Giansanti while he was on duty about 20 times over an eight-month period, including in his squad car and at a baseball field, the newspaper reported. Giansanti resigned the next day.
No criminal charges have been filed against either officer, according to affidavits of separation received by the Florida Department of Law Enforcement.