Investigators from the League Against Cruel Sports said they saw no gunmen and heard no shots when they filmed the Jedforest Hunt in February 2016.
However, Malcolm Henderson told a court he had been there with a shotgun.
John Clive Richardson, 66, and his son Johnny Riley, 24, both deny deliberately hunting a fox with dogs.
Mr Henderson, who has worked with the hunt for the past two years, said he had been at the site near Jedburgh on the day in question.
He told Jedburgh Sheriff Court he was present when a fox was flushed from cover and pursued by hounds towards his gun which the law permits.
He told the trial: "I was there.
"I was down in the dip but they (the investigators) would not see me from where they were standing."
Earlier in the trial, Mr Richardson had told the court that Mr Henderson had shot and wounded the fox.
Mr Richardson and Mr Riley, of Bonchester Bridge, deny breaching the Protection of Wild Mammals (Scotland) Act 2002.
The trial will continue later this month.

Moises Henriques hit 18 runs as the Sixers scored 22 in their extra over, while the Heat made 15 in reply.
Brendon McCullum had earlier scored 46 as the Heat compiled 167-9.
The Sixers looked well set after Henriques' 64, but Ben Dwarshuis had to score two runs off the final ball to tie the game at the Gabba.
Henriques then hit two sixes and a four in the super over.
The Sixers will play the Scorchers, who are two-time champions, in the final at the Waca in Perth.

Belgium's Gianni Meersman sprinted to victory, while Darwin Atapuma retained his overall lead despite being one of the riders caught behind the collision.
Colombian Atapuma lost more than a minute, but organisers applied the 3km rule to determine finishing times.
Froome and second-placed Alejandro Valverde were part of the bunch sprint having been ahead of the crash.
The accident split the pack in the closing stages and ended the race of Dutch rider Steven Kruijswijk, who sustained a suspected broken collarbone.
It was a second win in this year's Vuelta for Meersman, who held off the challenge of Italy's Fabio Felline and Kevin Reza of France.
Team Sky's Froome is aiming to become the first man in 38 years to win the Vuelta and Tour de France in the same season.
1. Gianni Meersman (Bel/Etixx-Quick-Step) 4hrs 16mins 41secs
2. Laurent Didier (Lux/Trek) same time
3. Kevin Reza (Fra/FDJ)
4. Luis Leon Sanchez (Spa/Astana)
5. Zico Waeytens (Bel/Giant)
6. Alejandro Valverde (Spa/Movistar)
7. Romain Hardy (Fra/Cofidis)
8. Jempy Druecker (Lux/BMC Racing)
9. Kenneth Vanbilsen (Bel/Cofidis)
10. Jose Goncalves (Por/Caja Rural)
1. Darwin Atapuma (Col/BMC) 17hrs 39mins 52secs
2. Alejandro Valverde (Spa/Movistar) +28secs
3 Chris Froome (GB/Team Sky) +32secs
4. Nairo Quintana (Col/Movistar) +38secs
5. Esteban Chaves (Col/Orica) same time
6. Gonzalez Sanchez (Spa/BMC) +1min 7secs
7. Andujar Fernandez (Spa/Movistar) +1min 10secs
8. Leopold Konig (Cze/Team Sky) +1min 12secs
9. Peter Kennaugh (GB/Team Sky) +1min 14secs
10. Gianluca Brambilla (Ita/Etixx-Quick-Step) 1min 22secs
A retired police wildlife crime officer has told the trial of two men accused of breaking Scots fox-hunting laws he was waiting in a gulley with a shotgun.
[NEXT_CONCEPT]
Sydney Sixers beat Brisbane Heat in a super over to reach Saturday's Big Bash League final, where they will play Perth Scorchers.
[NEXT_CONCEPT]
Britain's Chris Froome remains third in the Vuelta a Espana after a late crash caused chaos on Wednesday's stage five.