A spokesperson for the Los Angeles County District Attorney's Office tells ET that the D.A. declined on Friday to file charges against the 21-year-old.
No further details were available at the time of publication.
Over the weekend, Tommy was spotted out and about in Los Angeles with his fiancée, Brittany Furlan. The two were seen leaving a local flea market.
As ET previously reported, police responded to a 911 call that Brittany made from Tommy's Calabasas, California, home on March 5, where the Mötley Crüe rocker claimed that his son had hit him. A Los Angeles County Sheriff's Department officer told ET at the time that Tommy was then transported to a local hospital, and was planning on pressing charges.
Hours after the incident, Tommy shared a since-deleted photo of his bloodied face to Instagram, captioning it, "My heart is broken. You can give your kids everything they could ever want in their entire lives and they can still turn against you. Good job Brandon! Great son!"
Brandon, who is the eldest son of Tommy and his ex-wife, Pamela Anderson, also shared a few cryptic videos to his Instagram Story. "As I get older, I have started to realize there are very few people you can trust," he said. "But anyway that's my super depressing thought for tonight, just thought I'd share it... be a d**k."
A source told ET that Brandon and Pamela have created a "united front" against Tommy in recent weeks. "Tommy is seething," the source claimed. "He is watching every move Brandon makes. He wants his son to beg for forgiveness, but that won't happen. He wants Brandon to show remorse and doesn't feel he has done anything to have deserved this."
"Brandon is sticking to his story that this was self-defense and that his father needs rehab," the source added. "Pam has made sure that they are ready with a team just in case Tommy doesn’t drop the charges. No one thought Tommy would take this so far. His family and friends have been pushing him to drop the charges, but he is being stubborn. Everyone hoped he [Tommy] was doing this to scare Brandon, but at this point they are worried if Tommy waits to drop the charges, there is a good chance the D.A. could charge him anyway."