A helicopter pilot reported a UAS approached their aircraft requiring the pilot to maneuver to avoid a collision. The UAS approached the helicopter again requiring further evasive action. After the second event the UAS landed.

Narrative

On the listed date I was working with Officer A as the crew of the flight. I was the pilot and Officer A was the Tactical Flight Officer. We were engaged with a priority call in the area of Location A; assisting patrol officers with a foot pursuit. At approximately XA:09 hrs I observed what appeared to be a set of aircraft position lights in front of the aircraft at the same altitude coming straight at us from the east. I could tell the lights indicated a small craft more likely a drone type. I had to abruptly maneuver our aircraft to avoid the drone colliding with the front of our aircraft. It narrowly missed us by 25 ft. I advised Officer A that a drone nearly collided with us and had to change our flight path to avoid. I advised him of its altitude and direction of travel that I last saw it traveling. We both began to scan the area to relocate the drone; causing us to depart the area and the priority call that we were assisting with. I climbed to an altitude of approximately 4;000 ft.; and reacquired the drone to our south. The drone was again heading toward us and was at an altitude higher that ours; descending toward us. I again had to maneuver to avoid the drone colliding with us. I continued to fly the aircraft in a manner to maintain observation of the drone with the hope that it would land and or run out of energy; leading us back to its operator. I had Officer A advise patrol units of our in-air incident and requested them to respond to the area we were following the drone. I also advised Air Traffic Control of the near collision; so they could warn other aircraft in the area. The drone; after continually tracking/targeting our aircraft; began to descend in the area of Location B. It landed on a business rooftop and appeared to attempt to hide its location under a parapet wall. We maintained visual of the drone; and directed responding patrol officers to its location. We also requested the fire department respond with a ladder to enable officers to access the rooftop. The drone was secured; and the battery removed with the intent to prevent the owner/operator to erase any recordings ownership details from the unit. The drone was placed into evidence. Public Officials were notified of the incident for follow-up investigation