Olsson said that if his client is cleared in the remaining two cases, he could be released later this year.
Bergwall said he stuck to his confessions until he stopped taking benzodiazepines in 2001. He then entered what he described as a therapeutic period of silence, speaking to no one for seven years.
In 2008, he withdrew his confessions in a Swedish documentary, and started seeking retrials for his convictions. He said he now considers himself mentally fit to be released.
Bergwall said he felt bad for relatives of the murder victims, some of whose cases are now too old to reopen.
‘‘There’s a lot left to explain,’’ Bergwall said. ‘‘And I will do that when the time is right.’’