Sneaky Killer: Sneaky Killer in a Sneaky Sudoku

Today's Puzzle:

Fascinating puzzle with an elegant solve for those of us that avoid pencil marking 😉

Link to Play:

Sneaky Killer by SneakySteve https://tinyurl.com/SudokuSleuthSneakyKiller

Rules:

Normal sudoku rules apply.

In cages, digits must sum to the small clue in the top left corner of the cage. Digits cannot repeat within a cage.

Clues outside the grid give the sum of the digits along the indicated diagonal. Digits may repeat along a diagonal if allowed by the other rules.

The digit in the grey square is even.