South Carolina rapper Speaker Knockerz (born Derek McAllister) was reportedly found dead in his home Thursday.

Richland County Coroner Gary Watts confirmed to WISTV that the promising MC was found inside his garage at his home located on Two Notch Road in Columbia.

A woman claiming to be the rapper's mother, Mesha Wilson, distraught because she hadn't heard from her son in days, took to Facebook for help find her son. In fact, Knockerz' last post on Twitter was March 4.

Damn bruh his mom just posted.....I guess it's true 😩 RIP fam @SpeakerKnockerz pic.twitter.com/P7QNYlCfoh

— Young Ca$ton (@Darian1017) March 7, 2014

Although an autopsy revealed no signs of trauma, toxicology results are still pending for final disposition in the case.

No foul play is suspected at this time.

The 19-year old spitter wasn't signed to a major record label, but his YouTube page includes some 53 videos, including "Lonely" and "Rico Story (Trilogy)," which have been viewed by underground rap fans 1,977,235 and 3,152,684 times, respectively.

At the time of his passing, he had 49 downloadable tracks available for sale on iTunes.

On his latest single, "Dap You Up," posted online just over a month ago, Knockerz shows his lyrical dexterity over a beat that he produced himself. With lines like, "Got all this ice on my muf---kin watch, I think he mad cause I'm winning and he not/Y ou rappers hot, you better thank Mr. Guwop/ Go steal his flow 'cause if you don't yo sh-- gone flop," it's evident that Knockerz was no hip-hop neophyte on the mic.

McAllister's death is rumored to be the result of a heart attack, but the Richland County Sheriff's Department is continuing to investigate.