Police last night launched a massive manhunt for a former Oxford University groundsman suspected of stabbing three members of his family to death.
Jed Allen is the prime suspect in the investigation into the killing of his six-year-old half-sister, his mother and her boyfriend.
The bodies of all three were found with knife wounds at the home he shared with them in Didcot, Oxfordshire.
Armed police and officers with sniffer dogs were last night combing Oxford University parkland where the stocky and tattooed bodybuilder once worked as a gardener.*
Victims: Philip Howard, 44, Jan Jordon, and her six-year-old daughter, Derin, left, were stabbed to death in their Oxfordshire home. Police are hunting for 21-year-old Jed Allen in connection with their murders
Doting brother: Allen at 14 with his half-sister Derin. The little girl, now aged six, was found dead on Saturday
Jed Allen
Forensics teams also arrived as the search for Allen spread to the university grounds.
As detectives warned the public not to approach the 21-year-old, pictures also emerged online of Allen clutching an axe and a 10-inch hunting knife.
In one photo, he is seen with blades between his clenched fingers like the Marvel comic superhero Wolverine in the X-Men films.
Neighbours suggested that Allen ? who has a distinctive spider tattoo on his left hand - had been struggling to come to terms with the breakup of his biological parents' relationship and often appeared sullen and introverted.
And on his Facebook page he wrote recently about how his job had 'turned sour already' and that he was 'fed up of being treated like dirt'.*
In another, he wrote: 'I've decided there is no time of day that I function well.'**
Manhunt: Jed Allen is prime suspect for triple murder
Allen lived with his 48-year-old mother Janet Jordon, Philip Howard, 44, and their daughter Derin Jordon at a ?300,000 council house in Didcot.*
The bodies were discovered there on Saturday at 8.20pm after police were tipped off that something was wrong by a neighbour.*
Forensic officers were combing the property yesterday. Although post-mortem examinations are yet to be carried out, police revealed the likely cause of death of the victims was stab wounds.
Allen's family had only moved to their semi-detached property two months ago from a smaller home a mile away.
Last night, Miss Jordon's former landlady spoke of the close bond between Jed Allen and his mother ? but said his troubled upbringing was tarnished by her addiction to alcohol.
Jane Ilott, 68, said: 'I didn't know Jed as a 6ft man, I know him as a little fella who was really struggling. 'He absolutely loved his mum and she him, but she didn't know... drink was Jan's real love but she did love Jed.'*
Suspect Jed Allen has a distinctive spider tattoo on his hand