Andrew Boxer and Graham Jones, two retired teachers were jailed for a total of 17 years for s*xually assaulting the same pupil several times while they both taught at his college.
Daily Mail UK reports that the two men were both convicted of several counts of indecently assaulting the same boy between 1988 and 1993, following a week-long trial.
Former history teacher Boxer, 67, was sentenced to 15 years behind bars for seven counts of indecent assault - six at the same address in Eastbourne, East Sussex and another in Cambridge.
Former music teacher Jones, 63, was jailed for two years after he was convicted of two counts of indecent assault - one on several occasions at an address in East Sussex and one at an address in Eastbourne between 1991 and 1993.
Both men taught at Eastbourne College at the time of the abuse, while the victim was a pupil there.
Boxer, of Eynsham, Oxfordshire, was ordered to sign the S*x Offenders' Register for life and served with an indefinite S*xual Harm Prevention Order (SHPO), severely restricting his access to boys.
Jones, of Eastbourne, was made a registered s*x offender for 10 years and served with a similar SHPO for the same length of time. Both were sentenced at Hove Crown Court following a seven-day trial.
Sussex Police emphasised that there was no current safeguarding issues for the college in relation to this matter.
Detective Constable Gary Baker of the East Sussex Safeguarding Investigation Unit said: 'Our investigation started in August 2015 when the victim came forward for the first time, having not told anyone of these traumatic experiences for many years.
'He had been befriended separately by Boxer and Jones when he entered the College and it is quite clear they both gained his trust before involving him in acts he then felt he could not report.
'Boxer in particular systematically "groomed" him, using the victim's acceptance of, for example, seemingly casual remarks and apparently accidental access to video porn and his own sexual acts, to bring about a situation in which the boy felt trapped.
'There is no evidence whatsoever that either man knew what the other was doing with the boy. We very much admire the victim's courage in coming forward now and supporting the prosecution through court, including giving evidence and facing cross-examination.
'It again shows that people who come forward to make such reports, however many years ago the events may have been, will be taken seriously and treated with respect, and we will always try to help achieve justice for them whenever possible.'