Free The Locked Room by Maj Sjöwall, Per Wahlöö

Gubbangen, twenty-six in Märsta, and now ninety. That makes over two hundred thousand! So they'll soon be ready.'
    'Ready?' Kollberg asked. 'Ready for what?'
    'Their big haul. Big with a capital "H". All these other jobs are just to get some finance. But any time now it'll be the big bang.' Seemingly beside himself with enthusiasm, he practically flew around the room. 'But where, gentlemen? Where? Let me see, let me see. We must think. If I were Werner Roos now, what move would I make? How would I attack his king? How would you do it? And when?'
    'Who the hell's Werner Roos?' Kollberg enquired again.
    'He's an airline purser,' said Gunvald Larsson.
    'First and foremost he's a criminal,' Bulldozer Olsson shouted. 'In his own way Werner Roos is a genius. He's the one who plots out everything down to the last detail. Without him Malmström and Mohre'n would be mere nonentities. It's he who does all the thinking. Without him plenty of others would be out of work. And he's the biggest skunk of the lot! He's a sort of professor of -'
    'Don't shout so damn loud,' said Gunvald Larsson. 'You're not in the district court,'
    'We'll get him,' Bulldozer Olsson said, as if he'd just hit on some genial idea. 'We'll nab him now, right away.'
    'And release him tomorrow,' said Gunvald Larsson.
    'Never mind. It'll be a surprise. Catch him off his guard.'
    'You think so? It'll be the fifth time this year.'
    'No matter,' said Bulldozer Olsson, making for the door.
    Actually Bulldozer Olsson's first name was Sten. But this was something everyone, except possibly his wife, had long ago forgotten. She, on the other hand, had very likely forgotten what he looked like.
    'There seem to be a lot of things. I don't understand,' Kollberg complained.
    'Where Roos is concerned, Bulldozer's probably right,' Gunvald Larsson said. 'He's a smart devil who's always got an alibi. Fantastic alibis. Whenever anything happens he's always away in Singapore or San Francisco or Tokyo.'
    'But how does Bulldozer know these Malmström and Mohrén guys are behind this particular job?'
    'Some sort of sixth sense, I expect.'
    Gunvald Larsson shrugged and said: 'But where's the sense in it? Here are Malmström and Mohrén, known to be a couple of gangsters, who, though they never confess, have been inside any number of times. And now, when at last they're under lock and key in Kumla, they're granted weekend parole!'
    'Well, we can't really keep people locked up in one room with a TV set for all eternity, can we?'
    'No,' said Gunvald Larsson. 'That's true enough.'
    For a while they sat silent. Both men were thinking the same thing: how it had cost the state millions to build Kumla Prison and equip it with every conceivable refinement designed to insu¬late social misfits from society. Foreigners with experience in penal institutions from far and wide had said that Kumla's internment department was probably the most inhuman and personality-deadening in the whole world. Lack of lice in the mattresses or maggots in the food is no substitute for human contact.
    'As for this murder on Hornsgatan...' Kollberg began. 'That wasn't murder. Probably just an accident She fired by mistake, maybe didn't even realize the gun was loaded.' 'Sure it was a girl?' 'Yeah.'
    'What about all this talk of Malmström and Mohrén, then?'
    'Well, it's just possible they sent in a girl..:'
    'Weren't there any fingerprints? As far as I know, she wasn't even wearing gloves.'
    'Sure there were fingerprints. On the doorknob. But before we had time to lift them one of the bank people had been there and messed it all up. So we couldn't use them.'
    'Any ballistic investigation?'
    'You bet your, life there was. The experts got both the bullet and the cartridge. They say she shot him with a forty-five, presum¬ably a Llama Auto.'
    'Big gun... especially for a girl.'
    'Yeah. According to Bulldozer that's another bit of evidence on this Malmström and Mohrén and Roos gang. They always use big, heavy weapons, to