removing deleted pictures

[mo1971]

Hi. I had taken pictures on my HTC sensation and then deleated them.. but when I pluged the phone to the pc it had put my pictures on there but it even bought back all the old pictures I had thought I deleated as they where know longer in the gallery.. as I really don't want those deleated pics seen again how can I totally remove them so next time I plug in to the pc they don't come back.. thanks for any help