Lasco, 57, was stabbed to death while trying to help another corrections officer who was being attacked. He worked at the prison in Michigan City for 11 years.
Another prison guard was critically hurt after being stabbed at the Indiana Department of Corrections Facility last Saturday.
Investigators said an inmate attacked the two correction officers in a common area of the facility around 2:40 p.m. Both were transported to St. Anthony's Hospital where one officer was pronounced dead.
The second officer was in critical condition, according to officials.
The inmate was identified as Tymetri Campbell, 38, who is facing several preliminary charges, including murder, officials said.
No other details have been released about the attack.
Indiana State Police are investigating.
Campbell was arrested in Peoria by U.S. Marshals in 2002 in connection to the drug-related slayings of three men in Indianapolis, according to the Associated Press.
Campbell was 19 years old when he allegedly gunned down a pair of brothers, 45-year-old Keith Resnover and 46-year-old Karl Resnover on Sept. 17, 2002. Another man, 26-year-old Anthony P. Johnson, also was found dead several hours later, the AP report stated.