A London man has been convicted on charges of killing four young men after having sex with them. CNNs Erin McLaughlin reports.brClassification: Serial killer Characteristics: Decided to become a serial killer as a New Year resolution Number of victims: 5 Date of murders: March-June 1993 .brRonald Joseph Dominique (born 1964) is an American serial killer from the Bayou Blue area of Houma, which is in Terrebonne Parish in southeastern Louisiana .brbrTheresa Knorr née Cross (born March 12, 1946) is a mother and murderer, known for severely abusing and murdering two of her children while using the others .