Glazier is charged with four counts of attempted murder and four counts of arson for allegedly setting fire to his neighbor Albert Artsvelyan's El Caminito Street home in La Crescenta in February 2004 and then again and May.
While investigating the May blaze, arson detectives found video surveillance footage at Artsvelyan's home that showed that the fire began when something was sprayed onto the home -- from Glazier's side of the property line -- and lighted with a long pole, Nordskog said Monday.
A commercial paint sprayer and other evidence investigators believe link Glazier to the crime, were recovered from Glazier's property the day of the May 13 fire.
On Tuesday, Nordskog said that in an effort to maintain a clean crime scene on May 13, Glazier was detained in front of his home, so detectives could investigate.
He was later arrested at the Crescenta Valley Sheriff's Station, Nordskog said.
But in reports Nordskog filed last year, he wrote that investigators "affected a probable cause arrest" on Glazier at the scene of the fire, Shapiro said.
Nordskog explained he clarified the day's happenings in other reports.
"So some reports say one thing and some reports say other things?" Shapiro asked.
Shapiro also brought up a photograph, that according to Nordskog in previous testimony, showed the side of Glazier's property that abuts the Artsvelyan home.
In that photo, Nordskog said there was a rake shown -- something he believed might have been used to rake and clean the area where the suspect would have been standing when setting the Artsvelyan's home on fire.
"Are you sure that's not Mr. Artsvelyan's home?" Shapiro said.
Nordskog, in response, retracted his comments.
"The more I think about it, I'm not sure what that photo is, or from what angle," he said.
Shapiro questioned several other discrepancies in Nordskog's testimonies and reports, including the number of times he said he watched surveillance video, who he watched that video with and the date and time Artsvelyan told detectives he was last at his home before the May 13 fire.
Closing arguments in the trial are today.