Son's arrest, what to expect.

[Constantanxiety25]

My 20 year old son was arrested over a week ago, his girlfriend has made accusations against him. He was held in a police cell for almost 24 hours. He was released without charge but with restrictions about contacting the gf.

He says the accusations are false and has cooperated with the police, he handed his phone over as soon as asked for example.
He's never been in trouble before, not school or college, he has a small group of supportive friends.
She is his first girlfriend. He says she has done similar to an ex of hers.
He has a solicitor who has told him he should get a letter explaining what happens next. There's been no letter or any other communication since he left the police. He's contacted his solicitor trying to get more info but nothing is forthcoming.
My question is why this is taking so long? What he is accused of happened in her house so there's no CCTV to look at. There's his word / her word and arguments on the phone.

(Oh sorry I just realised that this is an old thread! Ignore me)

Firstly, than you to all sending supportive messages, it was a very difficult time.

Secondly, no real update. He stuck to the bail conditions which were extended for 9 months and then he was released under investigation. He was asked to see the investigating officer at about the 9 month mark but then told there was no need (30 mins before the appt).
In short he was arrested a year ago, kept in a cell for almost 24 hours, questioned for less than an hour and his phone taken off him. Over a year later not much has changed.