Los Angeles ( CNN ) -- A third former Fullerton , California , police officer was charged in the beating death of a mentally ill homeless man , the Orange County district attorney said . Joseph Wolfe , 37 , pleaded innocent Thursday to one count of involuntary manslaughter and one count of use of excessive force in connection with the death of 37-year-old Kelly James Thomas on July 7 , 2011 . The charges against Wolfe came as a result of a grand jury indictment handed down on Monday , District Attorney Tony Rackauckas said in a statement . Since Thomas ' death , the district attorney 's office `` has actively continued its investigation and legal review and decided to seek indictment against Wolfe following extensive legal and factual analysis and development of evidence , '' the statement said . California cop pleads not guilty in homeless man 's death . Wolfe was released on $ 25,000 bail , according to authorities at the Orange County jail . He faces up to a maximum four years in prison , if convicted . Wolfe 's defense attorney , Vicki Podberesky , did not immediately respond early Friday to a CNN request for comment . The indictment against Wolfe comes nearly a year after two other former Fullerton police officers were charged in the case . They were ordered to stand trial in May . The grand jury heard testimony from 10 witnesses and reviewed 113 exhibits of evidence over three days before handing down the indictment against Wolfe , the statement said . State law requires grand jury transcripts to be sealed for 10 days after the defense has received the documents . Thomas , a lifelong resident of Fullerton , was shirtless and carrying a backpack , and was wearing long pants and slippers , when Fullerton police were called to investigate a `` homeless '' man looking in car windows and pulling door handles of parked cars at the city 's bus depot last July , according to a lawsuit filed by Thomas ' father . Father sues California police . A security camera at the downtown bus depot provided 16 minutes of video of the officers questioning and then beating Thomas , who was schizophrenic . Former Officer Manuel Ramos is charged with second-degree murder and involuntary manslaughter , and former Cpl . Jay Patrick Cicinelli is charged with involuntary manslaughter and felony use of excessive force . Both have pleaded not guilty . A pre-trial hearing is scheduled for November 30 . Ramos , 37 , a 10-year veteran of the police department , faces a maximum sentence of 15 years to life , if convicted , authorities have said . Cicinelli , 39 , a 12-year Fullerton police veteran , faces a maximum of four years in prison , if convicted . Recently , Thomas ' mother , Cathy , received $ 1 million from Fullerton 's insurance reserves in an agreement to settle her claim against the city in her son 's death , according to a city statement . Cathy Thomas , who 's divorced from Frederick `` Ron '' Thomas , released the city and its police officers from all potential claims , the city 's statement said . Thomas ' father , Frederick Thomas Jr. , filed a lawsuit in July against the city , its police chief and the six officers allegedly involved in the fatal incident . The lawsuit seeks more than $ 25,000 in damages . Homeless man cries 'help me ' as cops fatally beat him in videotaped incident . CNN 's Chelsea J. Carter contributed to this report .
Joseph Wolfe , 37 , was charged with involuntary manslaughter of a homeless man . He is accused of participating in the killing of 37-year-old Kelly Thomas . Thomas , who was mentally ill , was beaten to death in July 2011 , officials say . Score: 7