LOS ANGELES (CBS) — Giovanni Ramirez, who is suspected of brutally beating Bryan Stow at Dodger Stadium on March 31, is also being investigated in an attempted murder case in Nevada.

Ramirez is scheduled to take a polygraph test Wednesday.

His attorneys tell CBS2 that they handed over several documents, including cell phone records, to detectives. They say they have 11 alibi witnesses who can prove Ramirez is innocent.

However, CBS2 obtained an official document that shows Ramirez is a named suspect in a premeditated shooting that took place in Henderson, Nev.,  earlier this year. The suspect description in that case says the shooter was wearing Los Angeles Dodgers gear.