BAYTOWN, Texas – In more than 30 years as a prosecutor and policeman, Clint Greenwood, assistant chief with the Harris County Constable’s Office, precinct three, often investigated other officers.
Texas Rangers and Baytown police are now questioning anyone who may have had a grievance against Clint Greenwood, who was ambushed and killed Monday.
One man they talked with early in the investigation is a former police officer who had a long running legal feud with Greenwood, but he claims he did not and would not have harmed him.
He is William Marks, 53, a former officer with the Roman Forest and Kenefick police departments.
Marks said he voluntarily went in for questioning the same day Greenwood was murdered outside his Baytown office.
“I was questioned, ‘Did you kill Clint Greenwood? Do you know who killed Clint Greenwood?” Marks said.
He said he answered questions, submitted DNA samples and was given a polygraph test before being released.
“I did not harm Clint Greenwood,” he told Channel 2 news. “I didn’t wish any physical harm to come to him. I wanted him to be held accountable for the oppression he occasioned against me.”
Marks' dispute with Greenwood began in 2012 when he filed a civil rights lawsuit against Greenwood, who he said wrongfully accused him of providing private security services without a license.
Marks claims Greenwood retaliated with criminal charges against him and two other former officers.
"After he was served with a lawsuit, three months later he went to the grand jury and filed charges, erroneous, fictitious charges,” Marks said.
One of the other former officers he said was targeted by Greenwood was Eric Baumgart, who talked with Channel 2 Tuesday.
Baumgart was in jail at the time of Greenwood’s murder, serving a 90-day sentence for tampering with official records. He said investigators searched his belongings Monday after having him removed from his cell.
William Marks said he was at home at the time Greenwood was killed.
“Monday is my day off, my only day off, and I was in bed asleep, sleeping late,” he said.
Marks' federal lawsuit is still active. He said he is currently appealing three misdemeanor violations of the state Private Security Act.