Detectives develop probable cause to believe that Harry Gashat committed a homicide during a drug deal gone bad. The detectives wait a couple of days before getting an arrest warrant. During this two-day time lapse, before the warrant is issued, the detectives tell patrol officers to pick up Harry if they see him.

Two proactive patrol officers go to Harry's house before the arrest warrant is obtained, but after the detectives have determined there is probable cause to arrest Harry for the murder. The officers knock on the door and no one answers. The officers see a light shining from under the door and hear music playing.

Question 1: Can the officers enter Harry's home to make the homicide arrest, and if they do, will evidence that is recovered in the house be admissible at Harry's trial?

Please be detailed as I struggle to understand the fourth amendment fully