The 31-year-old grandson of late Chicago Defender publisher John Sengstacke was arrested today after an officer found a handgun in a vehicle he parked near Barack Obama's South Side home, police said.
Omhari Sengstacke -- a twice convicted felon -- is charged with unlawful use of a weapon by a felon and criminal trespassing to state land, police said.
Sengstacke did not make any threats against Obama, according to the Secret Service.
"He does have mental issues," said Sengstacke's brother, Saief Sengstacke.
Obama was home at the time of the arrest, but flew to Florida later in the morning.