Stewart and Agathe turned detective to find out who stabbed their cat Hendrix (Image: Stewart Montgomery)

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Ex-soldier Stewart Montgomery has revealed how he and his girlfriend turned pet detectives to snare a serial cat killer.

Stewart, 34, followed blood splatters outside the home he shares with Agathe Altwegg, 33, after their moggy Hendrix returned home with a fatal stab wound.

He tracked down CCTV showing the chilling moment Steve Bouquet attacked Hendrix yards from their front door.

It was the vital piece of evidence that ended the former security guard’s reign of terror in which he slaughtered at least nine cats in Brighton, East Sussex.

Bouquet, 54, was this week found guilty of attacking a total of 16 moggies in the resort – only seven of which survived.

Stewart and Agathe were heartbroken when their cat Hendrix was stabbed to death

Stewart told the Sunday People how he and Agathe turned ’tec after their beloved black cat came home bleeding heavily.

Stewart said: “I saw blood weeping out of him. There was blood splatter on the fence, there was blood on the floor, blood on the cat flap.

“I knew there were cameras outside. I walked along following the blood trail. I got to the place where the trail stopped and I looked back to see if I could see the camera and I couldn’t. So I got down on to the floor and you could see the camera perfectly.”

Agathe, a graphic designer, said: “We thought if we can see the camera, it can see him.”

Security guard Steve Bouquet, 54, was remanded in custody for sentencing on July 12
(Image: Hyde News)

The couple asked neighbours if they could review their CCTV tapes – and that is when they saw the face of the Brighton Cat Killer for the first time.

Stewart said: “You can see he walks back and forward a couple of times and realises he’s been caught red-handed.”

Bouquet’s killing spree lasted eight months.

Chichester Crown Court heard that the former Royal Navy sailor had pictures of the cats he attacked on his phone. And when officers searched his flat they found a knife stained with feline blood.

Footage of Bouquet stabbing Hendrix

Bouquet was tried in his absence after failing to appear at court.

But he was arrested on Monday night after a tip-off from a passerby who saw him drinking in a park.

He will now be sentenced a week tomorrow.

Hendrix died from his injuries after he stabbed by the Brighton cat killer
(Image: Stewart Montgomery)

Judge Jeremy Gold QC said: “I take a very serious view of this case. There will be consequences.”

Stewart, whose pet died from its injuries, said: “Not turning up to court? What a coward, what a coward.”

The couple, who now have a new cat Cleo, are campaigning for tougher laws for killing pets, which is currently classed as criminal damage.