Killer boyfriend who stabbed his stable hand girlfriend 80 times built up his strength by training on a punch bag she bought him

Chilling videos posted on Facebook show Jordan Taylor, 22, pummeling a punching bag in a series of frenzied workout sessions (pictured right) months before he killed horse groom Laura Davies
(pictured centre). He stabbed her more than 80 times as he chased her through the Essex Horse and Pony Protection Society, in Pitsea, where she lived and worked. Unemployed Taylor (topleft), who spent his days playing violent video games, was overcome with 'anger and jealousy' after Miss Davies ended their relationship on July 3 last year. The attack was so forceful that the six-inch kitchen knife he used was bent to a 45-degree angle (bottom left). Pictured inset, Miss Davies' mother, Dyanne Lambert, who has spoken for the first time about how she missed the signs her daughter was in an abusive relationship.