File this one under not-so-amicable breakup.
After firing him from the band in February, the Stone Temple Pilots sued their former frontman Scott Weiland for breach of contract Friday, accusing him of using the band's name to promote his solo career.
In the lawsuit, the band says Weiland is still using the band's name and songs and asks a judge to block him from ever doing it again.
The band mates also detail their issues with Weiland while he was still a member of the Stone Temple Pilots, saying he "seriously harmed the band" back in 2012 by continually being late to performances, failing to communicate with them and costing them millions when he wouldn't commit to their 2012 tour schedule.
The band says they fired him because they could "no longer be held hostage by a band member who continually puts his personal interests above those of the band," according to the complaint.
After he was dismissed from the group, though, the band says "Weiland's conduct got worse," claiming the 45-year-old singer stole their "intellectual property" and threatened tour members to prevent them from performing without him.
And that's not all.
STP also claims in their suit that Weiland's lawyer called the head of programming at Los Angeles radio station KROQ and tried to keep them from playing the STP's song "Out of Time," saying that doing so would infringe on Weiland's rights.
The band—with a new frontman, former Linkin Park singer Chester Bennington, joining band mates Robert DeLeo, Dean DeLeo and Eric Kretz—asserts in the suit that they own all the rights to the name Stone Temple Pilots, as well as all of its songs, copyrights and trademarks, and that no former member can use the Stone Temple Pilots name.
After finding out that STP had a new lead singer, Weiland posted a letter to fans on his website Friday, saying the news "hurt," and that they didn't have the right to use the STP name now that he is no longer in the band.
"First of all they don't have the legal right to call themselves STP because I'm still a member of the band," Weiland wrote. "And more importantly, they don't have the ethical right to call themselves Stone Temple Pilots because it's misleading and dishonest to the millions of fans that have followed us for so many years."
"When I tour on my own, it's never as Stone Temple Pilots. It's as Scott Weiland. The fans deserve to know what they're getting," he continued. "Like any band that's stood the test of time and made music for more than two decades, STP had a special alchemy—the four of us together were greater than any one of us apart. So if my former band mates want to tour with a new singer, that's their prerogative. I don't give a f--k what they call themselves, but it's not Stone Temple Pilots. And so I say to you, our fans, I'll see you out there on the road this summer where I'm touring as 'Scott Weiland' with my band The Wildabouts. But don't give up on STP. I know I haven't."
Weiland's manager has not responded to E! News' requests for comment.
STP is seeking injunctive and monetary relief in the suit.