Thomas Warwick, the musician’s lawyer, said his client had gotten into body building and eating healthy, and later began taking nutritional supplements as a paid product spokesman. At some point, he also began taking steroids, he said. “His thought processes were devastatingly affected by his steroid use,” Warwick said.

The prosecutor argued that Lambesis be held on $20 million bail, citing the musician’s wealth and global connections, but his defense attorney argued that the amount was unreasonable. If he bails out, he was ordered to stay away from his wife and their three children.

Lambesis was taken into custody on Tuesday in Oceanside, California, after he solicited help from the detective, the San Diego County Sheriff's Department said in a statement. Police had previously learned Lambesis was seeking someone who could commit the slaying, the department said.

Almost everyone in the DIY scene has had an experience with phony police emails, direct messages on Twitter, and interactions on social media. For some it's become just another part of the promotion business—a game of spot-the-narc in which the loser gets his show shut down. According to one local musician who asked not to be named, the day before a show this past weekend, police showed up at a house in the Allston neighborhood, home of many of these house shows, claiming that they already knew the bands scheduled to play....

As it now stands, after seeking the small amount of legal advice that we could buy ourselves, the crux of this situation is that: regardless of how long we have been using the name, any attempt to stop the other party using it will have to involve a lengthy journey through the courts. In other words, at the end of the day, the person who has the most money and therefore the resource to fight their case to the bitter end, will win. We could pile all of our money into the situation, of course but eventually (probably quite quickly) our money will run out and our battle...

Both Mr. Musson and Mr. Delgado are seeking compensation from Mad Decent Records, which put out the single last year. The label and Mr. Rodrigues declined to comment. But the tale of how an obscure dance track containing possible copyright violations rose to the top of pop charts illustrates not only the free-for-all nature of underground dance music but also the power of an Internet fad to create a sudden hit outside the major-label system.