Authorities say the actor-rapper subdued Jonathan A. Kirby early Wednesday after finding the man in his Los Angeles home, breaking Kirby's nose, jaw and ribs in the process.
Kirby, 58, has a lengthy arrest and criminal history in LA, but also was convicted of voluntary manslaughter in Dallas in 1988.
Records show Kirby was sentenced to six years of imprisonment, but was paroled the following year. By January 1990 he had been arrested on a prostitution-related charge in West Hollywood, and in 1995 was convicted of felony residential burglary. He is charged with the same offense in the LL Cool J incident and could face 38 years to life in prison if convicted.
No additional details about the circumstances of the Texas manslaughter conviction were available Friday.
Prosecutors want Kirby, a transient who has used different names and dates of birth over the years, treated as a third-strike offender.
Authorities say LL Cool J, whose real name is James Todd Smith, and his family were unharmed during the break-in, and nothing was apparently taken from their home.
Kirby has yet to make a court appearance and had to be hospitalized because of his injuries.