Sherlock was sitting on a low wall, when he first heard the sirens approaching St. Marks. At first he assumed they were just passing by, going somewhere else, but he was wrong. The sirens got louder and louder as the vehicle whizzed through the open school gates. Three men rushed out of the ambulance and sped towards the gym. Sherlock stiffened, trying to work out what was going on, he hoped Sophie was okay, she had been in the swimming pool next to the gym. A few more minutes passed, crowds of children and people walking past the gates gathered to see what was happening.

Sherlock saw Sophie, standing on the other side of the field, look very shocked and quite scared. He ran over to her, however much Sherlock Holmes hated running, he would definitely run to help Sophie.

'What happened?' he asked hurriedly when he reached he. She stood still, as if fear had paralysed her. Eventually, she opened her mouth, though no sound came out. 'Sophie! Are you ok?' Sherlock asked, he sounded truly worried now.

'It was horrible,' she said, barely audibly, 'He just, he just...started shaking, and then, then...he, he just..sort of sunk...down, and, and, I saw it' she looked faint and pale.

'Sophie,' Sherlock asked, 'Who sunk?'

'Carl Powers' she whispered. Sherlock was quiet for a while, then a smile lit up his face, 'Sophie, this is brilliant!' he said.

'What?' asked Sophie a lot louder than before, 'Sherlock, someone just died, I just saw someone die!'

'Yes,' explained Sherlock, 'and now we get to work out who killed him! Its not just pretend anymore! The game is real!' Sophie stared at him, slightly shocked.

'I don't think we should do that Sherlock, the police will do that.'

'Oh, what do the police know?' Sherlock asked, 'There's no time for the police, we have to do this. Start with telling me exactly what happened, what did you see Sophie?'

Sophie took a big breath, and despite her doubts of the plan, begun. 'Carl was just with some friends, they were swimming lengths of the pool, and suddenly, Carl just starts shaking all over, as if he's going to explode. He couldn't control his body, so he just began to sunk. At first, everyone thought he was just having a laugh, I mean, he looked really strong, so I just thought he was good at swimming. But then, his friends said he'd been down there for a while, they asked a teacher. She jumped in to try and pull him up, and she did, but he wasn't breathing, someone else called an ambulance while she breathed into his mouth. Another teacher was telling us all to leave the swimming pool, then I got changed back into my uniform. I think that's everything' Sophie screwed up her face trying to remember any small details.

'Okay' Sherlock nodded, 'and what happened before he started to sink? For instance, did he take a drink anyone gave him? Did anyone give him any sweets?'

'You think someone poisoned him?' Sophie gasped.

Sherlock rolled his eyes, 'Of course someone poisoned him, a huge guy like him, he wouldn't just sink and die. And he was a bully, he must have had enemies, did you see him being mean to anyone?'

Now it was Sophie's turn to roll her eyes, 'Sherlock, there's no way someone our age killed Carl Powers. We're 10, 10 year olds don't kill anyone, I mean, I did see him pushing a lot of people around, laughing at this creepy kid, but, no-one would kill him.'

'Hmm' Sherlock said, 'We need to go to the swimming pool for clues.'

'Sherlock,' Sophie whispered, 'this isn't going to work, we're not allowed to be here!'

'Don't be scared' said Sherlock. Sophie stopped, 'I'm not scared Sherlock'

'Yes you are' he said, 'Shut up' she replied, 'Anyways, I deduce that you're scared too' she said slightly proudly.

Sherlock smiled, 'Not as scared a you, shh, were by the locker room door, anyone could be inside.' He poked his head around the door, 'It's empty, lets go!'

The pair sneaked into the locker rooms, it looked completely normal, and walking in you would never have been able to tell someone had died less than half an hour ago, through the adjacent door.

'Which locker is Carl's?' Sherlock asked, Sophie shrugged in response.

'Don't ask me, this is a boys locker room,' she wrinkled her nose, 'And it stinks in here.' Sherlock looking at the name tags of each bag, until he found one which said 'Carl Powers' in big, messy writing. 'This is the one.' He said proudly to Sophie. Carefully, he zipped the bag open and rummaged through the clothes.

He frowned, 'It doesn't make sense,' he muttered, Sophie looked at him quizzically, 'He's got everything in here, eczema cream, his clothes, a water bottle, but no shoes.

'Maybe he put them on the floor' Sophie suggested.

'No,' murmured Sherlock, 'there are no shoes around here, and he would have put them in his bag, judging from how neatly everything is folded and organised.' Sherlock swept his eyes across the room again, his piercing gaze falling on Sophie for a second.

Sophie thought for a moment, 'If we find who took Carl's shoes, we'll find his killer! And it would have to be someone who could get in here without anyone noticing, so it is someone here!'

'Exactly!' cried Sherlock.

'Hey!' a voice from behind them shouted, 'what are you two doing here? You have to back to class.' Sherlock scowled, Sophie, who by now knew his scowl perfectly, did the same.

The next day, the newspapers read 'SCHOOL BOY DIES IN TRAGIC ACCIENDENT'.

'No!' shouted Sherlock, 'They've got it wrong someone killed Carl!' he said exasperatedly.

'Why on earth would someone want to kill a 10 year old boy?' Violet asked, amusement and sadness glistening in her eyes.

'I don't know,' said Sherlock stubbornly, 'But they did.'

'And just how do you know that?'

'His shoes, they weren't there. The killer took them.'

'Why would a murderer want Carl's shoes?'

'I don't know,' said Sherlock, 'but I'm going to work it out.