Police searching for 24-year-old Thomas Doherty from Crawley, have now offered a £500 reward for information leading to his arrest and conviction.
Officers want to interview Doherty on suspicion of breaching court bail conditions, witness intimidation and criminal damage.
He has already been charged with common assault.
Doherty is described as white, 5’7″, of slim build, and unshaven with dark brown hair.
Detectives believe he may still be in the Crawley area.
He appeared at Crawley Magistrates’ Court on Tuesday (27 March) charged with common assault on a 19-year-old woman known to him and was given court bail until a further hearing at Horsham Magistrates’ Court on 22nd May.
Officers are now investigating allegations that Doherty had since 27 March threatened the witness and smashed windows at two addresses in the East Grinstead area.
Detective Constable Jake Dallaway of the West Sussex Safeguarding investigations Unit said; “If you see Thomas Doherty or know where he may be, please contact us right away on 101 or 999, quoting serial 970 of 27/03.
“You can also contact the independent charity Crimestoppers anonymously on 0800 555 111.”