Sussex Police have issued an urgent public appeal following the disappearance of a 27-year-old man from Bognor Regis.
Christopher was last observed on Monday, 24 August.
The constabulary has voiced significant worries regarding his safety and is calling upon members of the public who may possess any relevant information to come forward.
The missing individual is described as tall in stature at approximately 6ft 3in, of slender build, with short dark hair and prescription eyewear.
He typically opts for attire in darker shades.
Investigating officers understand he may have been operating a red Ford Fiesta.
An image of the vehicle has been circulated by the force to assist with identification.
Authorities are particularly interested in speaking with anyone who may have encountered Christopher or the red Ford Fiesta recently.
Members of the public with any information should dial 999 and quote the reference number 588 of 02.09.
Detectives working on the case have suggested the 27-year-old maintains ties to various towns across three counties.
Settlements within Surrey, Hampshire and Oxfordshire have all emerged as potentially significant locations during the investigation.