
Demon Focalor is a Duke and he can protect you from very dangerous people like criminals. Moreover, Focalor is a murdering spirit, but he will not harm anyone if you do not wish harm to the target.
If it is their destiny to die, Focalor will gladly assist them (if you ask Focalor).
Source: Goetia
I also offer you a post about the Dukes of Goetia and how they can help you. The descriptions of Focalor, Bune, Astaroth, Zepar and other demons are found there.
After I did three simple spells with Andromalius to protect myself from a certain individual, I summoned Darochiel from Goetia Theurgia and asked him to give me a sign if I should summon Focalor.
The sign came via a message early in the morning. I understood that I must do a binding spell with Glasya- Labolas or with Focalor.

In some situations, it makes sense to take the target as our hostage and do a binding spell to protect us from harm.
I have been in some nasty situations before too, and that time Belial had stepped in. Belial operates very fast and he is very helpful. Below is one such video:
If you are doing this spell on someone very dangerous for you, ask Focalor to physically eliminate them should they attempt to harm you physically or in some other way.
Focalor:
the best time for witchcraft

Focalor comes from sphere number 7. This sphere is called Netzach and it is ruled by the planet Venus. If you are into the Qliphoth, then the Qlipha is called Harab- Serapel.
The correspondences of Netzach are such:
Ruling planet: Venus
Day: Friday
Astro hour: Venus
Paper seal colour: green
Metal seal: copper
Number in magick: 7
Candle: black (for binding)
The best day for rituals with demon Focalor is Friday. Fine tune your magick by selecting the astrological hour of Venus.
You will need:
the seal of Lucifer

the seal of Focalor
a black candle (paint with olive oil and powder with powdered garlic)
a doll of the target
2 security pins and black thread (to restrict the doll)
grave dirt from a lawyers grave or dirt from the police office or from the court house
a piece of dried snake skin (10 cm) is packed together with the doll to keep the target away from you
hot foot powder (powder the doll)
a slip of paper for the head cavity. Write: “I have even forgotten about [Name Surname] and I will not harm [Name Surname], because she is a crazy Witch and she can kill me with magick. Too risky to fight a Witch like her.”
Tabasco sauce and dried mustard for the head cavity

The evocation of Focalor:
“I evoke and conjure you my demon Focalor. I call you forth in the name and by the authority of my Master Satan.
Please come to me Focalor, and please help me to protect myself from [Name Surname]. Keep an eye on this person and do not allow this person to approach me.”
Activate the doll of the target. Wet the small strip of paper for the head cavity in Tabasco sauce (gives roots to irrational fears) and add also dried mustard (the thought of hurting you will feel uncomfortable).
Pack all this into the head of the doll and sew shut the head cavity. Bind the doll with black thread, and also use security pins.
Powder the doll with the hoot foot powder, add the piece of snake skin, and also the grave dirt. Instruct the doll to stay away from you.
Ask Focalor to eliminate this person from your life. The demon will take care of the target.
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