Posted: Monday, January 14, 2013 11:56 am

Houston appeals attorney Tim Hootman filed the writ of mandamus seeking not only the DNA evidence from the case but other evidence as well.

Hootman said he wants his own expert to examine the DNA evidence used to convict Lopez  to determine if there is anything that comes up that could warrant another appeal.

Lopez, the former leader of El Grupo Mazz, was convicted in 2006 on two counts of sexual assault of a child and one count on indecency of a child.

A jury found him guilty of having sexual relations with a 13-year-old relative at his condo in 2004.

 Lopez was sentenced to 32 years in prison, but because he is serving the sentences concurrently rather than consecutively, his punishment amounts to 20 years in prison.

The Tejano star and his family continue to maintain his innocence.

The DA's Office is declining comment pending a thorough review of the lawsuit, spokeswoman Melissa Zamora said.