To help clarify. Sketch released in 2017 (older/heavier set/hat) was drawn approximately five months after the murder "and was based on "recent information" from a witness who saw the suspect about the time of German and Williams' deaths." More information here:
Police unveil composite sketch of Delphi double homicide suspect. Sketch released in April, 2019 (younger-looking/no hat/ thinner) was drawn days after the murder by Master Trooper Taylor Bryant and "based on the description of a man by a witness who reported seeing something they felt needed to be reported." More information here:
'New' Delphi suspect sketch was drawn days after murders of 2 Indiana girls, artist says. The sketch released in 2017 is no longer considered to be a person of interest. We don't know why. The sketch released in April, 2019 is considered to be the suspect and is, according to law enforcement, BG.