Paul Ashworth (Image: Suffolk Police / SWNS)
Paul Ashworth, who may be using the alias of Edward John Oliver, was last seen in Ipswich on Friday, February 7.
The 71-year-old, from Lowestoft, was at court where he was standing trial for three sexual offences.
The jury had left to consider the verdicts and in that time Ashworth, who was not on remand while the trial was ongoing, left court.
Ashworth was found guilty of the offences in his absence.
CCTV still of Paul Ashworth. (Image: Suffolk Police / SWNS)
He is due to be sentenced on Friday, April 4.
Officers have conducted enquiries to find Ashworth and it is believed he withdrew cash from an ATM in Portsmouth on Monday afternoon.
Police are working with the UK Border Force and Hampshire Constabulary after the discovery of the cash withdrawal.
Anyone who believes they have seen Ashworth, or who has any information regarding his whereabouts, is asked to contact police, quoting reference 37/8971/25.