Ok, now I understand why his wife said he had not been arrested.
In Scandinavia and the rest of the continental Europe the word arrest have a different meaning than in England and Wales. Here in the continental Europe arrest is equal to pre-trial detention in jail. Interrogation at a police station is not an arrest. Also, we don't have pre-charge police bail. With other words, in the continental Europe if there isn't sufficient evidence you neither can be charged nor arrested (put in jail) more than 48 hours for an offence.
The police in England and Wales can grant pre-charge bail, also known as police bail, to individuals arrested on suspicion of committing a criminal offence, but where there are no grounds to keep them in detention while the investigation is ongoing. At this stage in the investigative process, there is insufficient evidence to charge the individual for the offence. PCB is used to manage the arrested individual during the investigation while evidence is obtained in relation to the offence. A person granted bail is periodically required to re-attend a police station. To secure compliance with the requirements of bail, conditions may be attached, such as no contact with a victim or restrictions on entering certain areas.
Substantial proportions of bailed suspects in England and Wales are ultimately not charged, with nearly half of cases resulting in no further action.