A 50-year-old man has been convicted of fatally shooting a mother, son and a family friend at a central Kansas City house in 2012. Anthony Walker of Kansas City was convicted Monday, December 5th of three counts of first-degree murder in the January 2012 deaths of 62-year-old Donna Pike, her 41-year-old son Herschel Pike, and 57-year-old Edward Williams. He was also convicted of three counts of armed criminal action and one count of first-degree burglary. The killings happened at the Pikes’ home. Prosecutors say Williams was shot when he went to the home to check on the Pikes, and an undercover police officer later purchased the murder weapon from Walker. Walker already is serving 30 years in federal prison after he was convicted of being a felon in possession of a firearm.