A California man was convicted Wednesday of a cruel campaign of cyberstalking and threats targeting families of the victims of the Parkland massacre, federal prosecutors announced.

Brandon Michael Fleury, 22, used 13 Instagram accounts under aliases that included alleged Parkland shooter Nikolas Cruz and notorious serial killer Ted Bundy in a weeks-long bid to terrorize the families, the US Attorney’s Office for the Southern District of Florida said in a statement.

“Many of the messages, including ones written under usernames referring to Cruz and containing Cruz’s profile picture, taunted the message recipients about the deaths of loved ones in the Parkland shooting,” the statement said.

Fleury sent 301 messages in December and January, including one that said “I’m your abductor I’m kidnapping you fool.”

“With the power of my AR-15, I take your loved ones away from you PERMANENTLY,” another said.

The Feb. 14, 2018, shooting at Marjory Stoneman Douglas High School in Parkland, Florida, left 17 dead. Cruz faces the death penalty if convicted.

Fleury, of Santa Ana, California, was arrested in January and extradited to Florida to face charges in the cruel hoax that taunted the victims’ families.

He was convicted of interstate cyberstalking and interstate transmission of a threat to kidnap, and faces up to 20 years in federal prison when he is sentenced Dec. 2.