Bright purple UFO caught in Delano, Minnesota

On April 17, 2019, a witness spotted a purple bright UFO over his home in Delano, Minnesota. What is it?

Witness statement:

Witness says he has been seeing ufo activity almost every day for more than a year, both inside and outside his home. has been photographing them on his digital camera. objects include a number of purple lights. one was a vertical cylinder perhaps two feet long and two inches wide which followed him around in his house. he went to the basement where his renter was sleeping and tried to wake him up to see the object, but the man remained asleep. the witness says most of the activity occurs at night, and if anyone else is present, the ufos do not put in an appearance. these statements are per my rough notes and should be checked with the witness.“ mn mufon chief investigator.

Source, 18th April 2019