Becky's step-brother, Nathan Matthews, and his girlfriend, Shauna Phillips, are reportedly being held by police on suspicion of murdering the teenager. Officers must either charge or release them by this afternoon.
The first picture has emerged of the couple suspected of killing Becky Watts.
Seen here in fancy dress, Shauna Phillips and Nathan Matthews, are being held in police custody.
Officers have until this afternoon to either charge or release them.
Becky Watts' uncle speaks exclusively to ITV News following the arrest of two people on suspicion of her alleged kidnap and murder.
Sam Galsworthy, uncle of missing Becky Watts, has spoken about the family's anguish as the search for her continues and they wait for news.