City of the dead - Are you a murderer

 

‘But are you a murderer?’ Rust asked matter-of-factly. (…)

The Doctor regarded him frankly. 'I don’t know.’

'Don’t you?’

'I don’t expect you to believe me, but no, I don’t. (…) You can
always run my description through your computers.’

'I have.’

'Find anything?’

'No.’

'There you go.’

'All that means is that you were never caught.’

'I don’t believe,’ said the Doctor in a thin, strained voice, 'that there is
anyone left to catch me.’

("City of the Dead", Lloyd Rose)