A smartphone voyeur has been jailed after he attacked his pregnant girlfriend during an argument at their home.
Kristoffer Roberts was on a suspended sentence and was supposed to have been attending a sex offenders' course when he attacked victim Lisa Barker.
She suffered bruising to her chest from a single punch but was so terrified by the attack that she moved away from her home and is now living at a secret address.
Roberts was supposed to have been working with probation officers at the time after being put on a suspended sentence for a campaign of voyeurism.
His technique was to sneak up behind woman shoppers and take images on his mobile phone up their skirts when they bent over to pick items off low shelves.
Police found 454 still and 203 moving images on three mobile phones and child abuse images on a laptop.
Roberts, aged 20, of Drum Way, Heathfield, near Newton Abbot, denied battery but was convicted at a trial at Torbay Magistrates and the case was sent to Exeter Crown Court for sentence.
He also admitted failing to comply with the sex offenders register, and breaching a suspended sentence for outraging public decency.
He was jailed for a total of six and a half months by Judge Geoffrey Mercer, QC at Exeter Crown Court. The Judge also made a restraining order banning him from contacting Miss Barker.
He told him:"You are only 20 and are described in the probation report as emotionally immature. You say you want to sort your life out. You need to grow up pretty quickly because the sentences you receive if you carry on behaving like this are just going to get longer and longer.
"You are young and your life is essentially ahead of you. You are no doubt a young man with abilities but at the moment you are wasting your life. This was a very nasty assault on your former partner."
Miss Janice Eagles, prosecuting, said the assault on his former partner Miss Barker happened at the home they were sharing in Torquay in April.
She suffered a severe bruise to her chest which was serious enough for her to see her doctor and which was still visible five weeks later.
Miss Eagles said:"The incident has caused her to move from her home address because she wishes to distance herself from him. She says he was taking drugs or legal highs and the argument started when she took a package of drugs and emptied them on the floor.
"He became angry and punched her, causing her considerable pain, and grabbed a knife from the kitchen which she was worried he was going to use to harm himself.
"The victim has made an impact statement which says she is now nervous about entering new relationships and fearful of meeting Roberts again. She says she was extremely sore and concerned because she was pregnant.
"She has moved to an address which she does not believe Roberts knows and the restraining order has been worded in such a way it is concealed."
She said the offence of not telling the police about a change of address happened after he moved away from the home he had been sharing with Miss Barker and did not notify his whereabouts within three days.
Mr Paul Dentith, defending, said Roberts acknowledged he was going to go to prison because this is his second breach of a suspended sentence.
He said the failure to register was a purely technical breach which happened when Roberts notified police of a new address while he was on bail but did not realise he had to give the same information for the sex offenders' register.
He said Roberts had complied with some elements of his supervision order and is now keen to get as much support as possible from the probation service.
