What are the release dates for Cold Case Files - 1999 A Killer Named Korn The Night Watchman 4-10?

The episodes you listed are actually titled, Cold Case Files - Killer Korn/1999 The Night Watchman 4-11 (not 4-10). This episode aired on February 28, 1999 (Killer Korn) and March 7, 1999 (The Night Watchman). These dates were the original air dates on the A&E television network during Season 1 of Cold Case Files.