PHOENIX - Police have arrested anArizona man who filmed his 16-year-old nephew walking city streetsdressed in a sheet and carrying a fake grenade launcher in an apparentbid to test police responses after the Denver theater shooting,authorities said on Wednesday.Michael David Turley, 39, was arrested on Monday over the making ofthe video, in which an unidentified narrator says he aims to “find outhow safe I really am” in Phoenix following the July Denver shooting thatkilled 12 people and wounded 58.The video depicts a man with a fake grenade launcher walking around aPhoenix intersection in what appears to be a blue sheet with darkmaterial covering his head and face. The filmmaker said it took 15minutes for police to respond.The amateur video, filmed eight days after the Colorado shooting at ascreening of a Batman movie, was broadcast on YouTube and titled, “DarkKnight Shooting Response, Rocket Launcher Police Test.”Turley was charged with knowingly giving a false impression of aterrorist act, endangerment, contributing to the delinquency of a minorand misconduct involving a simulated explosive.He is being held in county jail on a $5,000 bond. If convicted, hefaces up to 45 months in prison, said Maricopa County Attorney’s Officespokesman Jerry Cobb.“We take something like this seriously,” Phoenix police spokesmanOfficer James Holmes said. “It wasn’t fun and games to all the peoplewho were affected by this. We don’t behave like this in this country toprove a point.”Police said officers reached the scene about three minutes afterreceiving numerous emergency calls from passers-by who said the personwas pointing a weapon as they drove by.The 16-year-old has not been arrested, Holmes said.“The video told us what Turley was intentionally trying to do - creating a terrorist hoax for his own personal ideals,” he said.