A married police chief and female sergeant are facing the sack after being accused of having sex in a patrol car while on duty.
Married father-of-four Chief Inspector Rob Leet, 44, allegedly had an 18-month fling with Sergeant Sarah Porter, 38, who was married with a daughter at the time.
The Sussex Police employees are said to have pulled into lay-bys while on patrol and had sex on duty.
They are also accused of making up false appointments as an excuse to meet up and have sex in police stations.
One alleged sex session meant traffic officer Sgt Porter was uncontactable when she should have been at the scene of a fatal car crash in East Sussex, a tribunal heard.
Both face charges of gross misconduct, which if proved will see them struck off after a combined total of 35 years of service.
Married father-of-four Chief Inspector Rob Leet, 44 (pictured left) allegedly had an 18-month fling with Sergeant Sarah Porter, 38 (right) who was married with a daughter at the time
CI Leet is also accused of meeting up with another woman, who he knew to be a former victim of domestic violence, for sex while he was on duty.
These incidents are alleged to have happened in in late 2014 and early 2016.
The scandal of his affair with Sgt Porter broke in March 2017 when fellow officers began to suspect they were meeting in secret.
Although they did not directly work together, Sgt Porter, who was married with a 10-year-old daughter, worked as a traffic officer and was often out on the road in her police car investigating accidents.
As a force area commander, Chief Inspector Leet, a married father-of-four, travelled from station to station as part of his duties.
Sources said the pair would organise their day-to-day duties so that an accidental meeting was very likely.
It was alleged the pair would meet up on the road and have sex before continuing with their duties.
CI Leet (pictured) is also accused of meeting up with another woman, who he knew to be a former victim of domestic violence, for sex while he was on duty
A police source said in 2017: 'They would co-ordinate their days very carefully to make an accidental meeting while on duty a likelihood.
'I understand the investigation is also looking at claims they would even meet up in lay-bys to have sex in a police car as well as hooking up at several police stations across the Sussex division.'
At the time Chief Inspector Leet, who has been on the force for 25 years, furiously denied conducting a secret relationship and said and said he and his wife of 22 years, also called Sarah, a florist, were committed to one another.
He said: 'I've been hung out to dry. The effect this has had on me, my family, the children, on work - it's absolutely devastating.
'It's damaging family-wise, every single one of my friends knows, career-wise - that's my reputation now.'
He has been suspended from his £60,000-a-year job since the scandal broke while Sgt Porter was allowed to return to work.
Sgt Porter left her