Police have launched a fresh appeal following an assault in Amersham.
Thames Valley Police have released a new E-fit image in the hope someone will be able to help with the investigation.
It follows an incident in Rodgers Way on May 23, where at 10.30am a woman aged in her thirties was jogging adjacent to the A413 and A355.
As she began approaching a man and woman, who were in a verbal argument with each other,
she noticed the man grab hold of the woman by her throat.
The jogger tried to intervene when this happened, but the man threw something towards her which hit her in the head before then producing a pen knife.
This led to a minor scuffle with the jogger sustaining a cut to her hand for which hospital treatment was not required.
The offender, who is depicted in the E-fit image, is described as a white man, with short and dark coloured hair, of medium build.
He was dressed in a North Face rain jacket in a dark colour, believed to be black or navy. He was also wearing hiking shoes.
The force is now releasing an E-fit image of the woman who was grabbed by the offender before the jogger tried to intervene, in the hope that it will help with the appeal for witnesses.
Investigating officer, PC Ben Flaherty, of Amersham Police Station, said: “I am again releasing the original E-fit that was circulated of the offender in this incident, but also now releasing an E-fit of the woman he was with at the time, who the jogger observed to be grabbed by the throat.
“I hope that re-releasing the original E-fit, and a new one too, will assist with any witnesses to this incident, but also someone that may recognise either or both people depicted.
“If you can help in any way, please contact Thames Valley Police, either by visiting a police station, reporting online, or calling 101 and quoting reference 43210222539.
“Alternatively, you can call independent charity Crimestoppers on 0800 555 111 for 100 per cent anonymity.”